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  1. Professor John Barbur

portrait of Professor John Barbur

Professor John Barbur

Professor

School of Health Sciences , Optometry and Visual Sciences

Contact Information

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Postal Address

City University London
Northampton Square
London
EC1V 0HB
UK

About

Background

John Barbur is Professor of Optics & Visual Science and Director of the Applied Vision Research Centre at City University London. John trained at Imperial College where he studied Physics, Applied Optics and Vision Science.

John's research interests cover both fundamental studies of visual mechanisms  as well as applied and clinical research. He has pursued the development of research instrumentation and new measurement techniques and this has resulted in new methods and instrumentation for analysis of pupil response components, spatial vision and chromatic sensitivity and the measurement of scattered light in the eye. The various techniques are based on both visual psychophysics and the measurement of involuntary responses such as eye movements and pupil signals and have been employed to study both applied and clinical aspects of visual processing.

Prof Barbur has been closely involved with the activities of the Applied Vision Association, the Colour Group of Great Britain, the International Colour Vision Society. Studies carried out over several years by Prof Barbur and his colleagues at City University London formed the basis for the formation of the Applied Vision Research Centre in 1986. Several students, with both clinical and basic science backgrounds have been trained in Prof Barbur's laboratory over 30 years and have found employment in industry, hospitals and universities. Professor Barbur is a Fulbright Scholar and spent time as Visiting Professor at the Center for Visual Science at the University of Rochester, N.Y. where he worked on colour vision, visual performance in the mesopic range and adaptive optics.

Qualifications

- BSc
- ARCS
- MSc
- DIC
- PhD

Awards

- The Scientific Award (Albrecht-Ludwig-Berblinger Prize) of the German Academy of Aviation & Medicine (2011)
- Arnold D Turtle Award 2009 (Association of Space & Environmental Medicine); The Walsh-Weston Award for 2008 (from the Society for Lighting Research & Technology)
- City University London Research Prize (2008)
- Fulbright Scholarship Award (Fulbright Commission, 1996)
- The BMA and the Harold Lewis Award for the contribution made to the research film "The Pupil" 1980

Administrative roles

- Member of SHS Research Committee
- Member of Senate Research Committee
- Member of EPSRC College of Experts
- Member of OPO editorial board
- Reviewer for RCUK, Wellcome Trust, Leverhulme Trust, FFS, etc
- Reviewer for principal vision related journals

Memberships of professional bodies

- The Optical Society of America
- The Applied Vision Association
- The International Colour Vision Society
- The Pupil Colloquium Society
- The Colour Group of Great Britain

Research

Research overview

Professor Barbur's research work is concerned primarily with the analysis and understanding of human vision and has been carried out mainly through psychophysical investigations, non-invasive measurement of involuntary signals, fMRI imaging and mathematical modelling of visual mechanisms.  Recently, John I has concentrated more on the translation of fundamental research findings into industrial and clinical applications. 

Research areas

- Mesopic photometry; Colour vision mechanisms / Colour constancy
- Blindsight / Pupillometry / Light flux sensing / Aging and vision
- Colour-defined motion / Rapid flicker
- Disability and discomfort glare

Grants

- 2008-2010, JL Barbur, Sasakawa Foundation Pupil Control Mechanisms and Clinical Applications
- 2009-2010, JL Barbur, Emerald Fund. Early Detection of AMD and other retinal diseases
- 2010-2013, JL Barbur, P Raynham (UCL) and A Smith (RH)    EPSRC. Street lighting glare: a study of discomfort glare using light scatter and fMRI
- 2011-2015, JL Barbur, S Fotios (Sheffield) and P Raynham (UCL)    EPSRC. Optimisation of mesopic illumination for residential streets
- 2011-2014, JL Barbur and M Rodriguez-Carmona. Colt Foundation Extension of CAD test in occupational environments
- 2011-2014, JL Barbur, UK Civil Aviation Authority. Minimum Colour Vision Requirements
- 2011-2014, JL Barbur, Qinetiq Ltd. Effects of altitude hypoxia on visual performance

Research centres

- Applied Vision Research Centre, The Wellcome Laboratories for Vision Science

Principal collaborators

- C.C. Hull (City University London)
- D.F. Edgar (City University London)
- A. Subramanian (City University London)
- B. Huntjens (City University London)
- G. Plant (National Hospital)
- P. Raynham (UCL)
- S. Fotios (Sheffield)
- D.Connolly (Qinetiq)
- D.Osorio (Sussex)
- M. Michaelides (Moorfields Eye Hospital)

Research assistants

- J.A. Harlow
- Dr Wei Bi

Fellows

- Dr Marisa Rodriguez-Carmona
- Dr Gary Bargary

Research Students

Name
Hickey Joseph
Thesis title
Colour vision requirements within Air Traffic Control Environment
Further Information
Marisa Rodriguez-Carmona (Co-supervisor) Colt Foundation, Civil Aviation Authority (Sponsor)
Name
Yingxin Jea
Thesis title
Discomfort glare in lighting installations
Further Information
Gary Bargary (Co-supervisor) EPSRC (Sponsor)
Name
Emily Patterson
Thesis title
Aging and disability glare
Further Information
Gary Bargary (Co-supervisor) EPSRC (Sponsor)
Name
Hanna Gillespie-Gallery
Thesis title
Vision in the mesopic range
Further Information
Gary Bargary (Co-supervisor) EPSRC (Sponsor)
Name
Ahmed Abdel-Hay.
Thesis title
A study of colour vision in patients with diabetes
Further Information
Ahalya Subramanian / David Edgar / Sobha Sivaprasad (Co-supervisor) Kings College London (Sponsor)
Name
Roopa Vemala
Thesis title
Colour vision loss in ARMD
Further Information
Sobha Sivaprasad (Co-supervisor) Kings College Hospital (Sponsor)
Name
Will Serle
Thesis title
Effects of hypoxia on mesopic vision
Further Information
Byki Huntgens (Co-supervisor) Qinetiq (Sponsor)

Publications

Journal Article (142)

  1. Bargary, G., Furlan, M., Raynham, P.J., Barbur, J.L. and Smith, A.T. (01 Mar 2015). Cortical hyperexcitability and sensitivity to discomfort glare. Neuropsychologia, 69, 194-200. doi: 10.1016/j.neuropsychologia.2015.02.006
  2. Millington, R.S., Yasuda, C.L., Jindahra, P., Jenkinson, M., Barbur, J.L., Kennard, C., Cendes, F., Plant, G.T. and Bridge, H. (2014). Quantifying the pattern of optic tract degeneration in human hemianopia. Journal of Neurology, Neurosurgery and Psychiatry, 85(4), 379-386. doi: 10.1136/jnnp-2013-306577
  3. Bargary, G., Jia, Y. and Barbur, J.L. (05 Dec 2014). Mechanisms for discomfort glare in central vision. Investigative Ophthalmology and Visual Science, 56(1), 464-471. doi: 10.1167/iovs.14-15707
  4. Pelah, A., Barbur, J., Thurrell, A. and Hock, H.S. (2014). The coupling of vision with locomotion in cortical blindness. Vision Research. doi: 10.1016/j.visres.2014.04.015
  5. Millington, R.S., Yasuda, C.L., Jindahra, P., Jenkinson, M., Barbur, J.L., Kennard, C., Cendes, F., Plant, G.T. and Bridge, H. (2013). Quantifying the pattern of optic tract degeneration in human hemianopia. Journal of Neurology, Neurosurgery and Psychiatry.
  6. Rauscher, F.G., Chisholm, C.M., Edgar, D.F. and Barbur, J.L. (2013). Assessment of novel binocular colour, motion and contrast tests in glaucoma. Cell and Tissue Research, 1-14.
  7. Rauscher, F.G., Chisholm, C.M., Edgar, D.F. and Barbur, J.L. (Aug 2013). Assessment of novel binocular colour, motion and contrast tests in glaucoma. Cell and Tissue Research, 353(2), 297-310. doi: 10.1007/s00441-013-1675-x
  8. Gillespie-Gallery, H., Konstantakopoulou, E., Harlow, J.A. and Barbur, J.L. (Sep 2013). Capturing age-related changes in functional contrast sensitivity with decreasing light levels in monocular and binocular vision.. Invest Ophthalmol Vis Sci, 54(9), 6093-6103. doi: 10.1167/iovs.13-12119
  9. Jia, Y., Bargary, G. and Barbur, J.L. (01 Jan 2013). A study of mechanisms for discomfort glare. PERCEPTION, 42, 88-89.
  10. Gillespie-Gallery, H., Konstantakopoulou, E. and Barbur, J.L. (01 Jan 2013). Capturing light and age-related changes in spatial vision. PERCEPTION, 42, 20-20.
  11. Alissa, R., Bi, W., Bessero, A.-.C., Plant, G. and Barbur, J.L. (01 Jan 2013). Vision in subjects with hyperawareness of afterimages and "visual snow". PERCEPTION, 42, 83-83.
  12. Patterson, E., Bargary, G. and Barbur, J.L. (01 Jan 2013). Understanding disability glare: light scatter and retinal illuminance as predictors of sensitivity to contrast. PERCEPTION, 42, 88-88.
  13. Bargary, G. and Barbur, J.L. (01 Jan 2013). Parallel processing under conditions of discomfort glare. PERCEPTION, 42, 24-24.
  14. Konstantakopoulou, E., Rodriguez-Carmona, M. and Barbur, J.L. (2012). Processing of color signals in female carriers of color vision deficiency.. J Vis, 12(2). doi: 10.1167/12.2.11
  15. Rodriguez-Carmona, M., O'Neill-Biba, M. and Barbur, J.L. (Jan 2012). Assessing the Severity of Color Vision Loss with Implications for Aviation and other Occupational Environments. Aviation, Space, and Environmental Medicine, 83(1), 19-29. doi: 10.3357/ASEM.3111.2012
  16. Barbur, J.L. and Konstantakopoulou, E. (01 Feb 2012). Changes in color vision with decreasing light level: separating the effects of normal aging from disease.. J Opt Soc Am A Opt Image Sci Vis, 29(2), A27-A35.
  17. Rodriguez-Carmona, M., O'Neill-Biba, M. and Barbur, J.L. (Jan 2012). Assessing the severity of color vision loss with implications for aviation and other occupational environments.. Aviat Space Environ Med, 83(1), 19-29.
  18. Konstantakopoulou, E., Rodriguez-Carmona, M. and Barbur, J.L. (2012). Processing of color signals in female carriers of color vision deficiency.. Journal of vision, 12(2).
  19. Millington, R., Yasuda, C., Beltramini, G., Jindahra, P., Barbur, J., Plant, G., Kennard, C., Cendes, F. and Bridge, H. (01 Jan 2012). Patterns of fMRI visual cortex activation in patients with hemianopia. PERCEPTION, 41, 157-157.
  20. Konstantakopoulou, E., Rodriguez-Carmona, M. and Barbur, J.L. (2012). Processing of color signals in female carriers of color vision deficiency. Journal of Vision, 12(2), 1-11. doi: 10.1167/12.2.11
  21. Serle, W., Connolly, D. and Barbur, J. (2012). Novel tool for assessment of visual performance when using NVD. Proceedings - Annual SAFE Symposium (Survival and Flight Equipment Association), 141-153.
  22. Barbur, J.L. and Connolly, D.M. (Aug 2011). Effects of hypoxia on color vision with emphasis on the mesopic range. Expert Review of Ophthalmology, 6(4), 409-420. doi: 10.1586/eop.11.32
  23. Rauscher, F.G., Plant, G.T., James-Galton, M. and Barbur, J.L. (Feb 2011). Evidence for non-opponent coding of colour information in human visual cortex: Selective loss of "green" sensitivity in a subject with damaged ventral occipito-temporal cortex. Neuro-Ophthalmology, 35(1), 1-6. doi: 10.3109/01658107.2010.540767
  24. Bridge, H., Jindahra, P., Barbur, J. and Plant, G.T. (Jan 2011). Imaging reveals optic tract degeneration in hemianopia.. Invest Ophthalmol Vis Sci, 52(1), 382-388. doi: 10.1167/iovs.10-5708
  25. Barbur, J. and Connolly, D.M. (2011). Effects of hypixia on colour vision with emphasis on the mesopic range. Expert Review of Ophthalmology.
  26. Buck, S., Barbur, J., Kremers, J., Nascimento, S. and Smithson, H. (Sep 2010). Proceedings of the 20th biennial Symposium of the International Colour Vision Society July 2009, Braga, Portugal.. Ophthalmic Physiol Opt, 30(5), 419-420. doi: 10.1111/j.1475-1313.2010.00777.x
  27. Jennings, B.J. and Barbur, J.L. (Sep 2010). Colour detection thresholds as a function of chromatic adaptation and light level. Ophthalmic and Physiological Optics, 30(5), 560-567. doi: 10.1111/j.1475-1313.2010.00773.x
  28. Crabb, D.P., Smith, N.D., Rauscher, F.G., Chisholm, C.M., Barbur, J.L., Edgar, D.F. and Garway-Heath, D.F. (2010). Exploring eye movements in patients with glaucoma when viewing a driving scene.. PLoS One, 5(3), e9710. doi: 10.1371/journal.pone.0009710
  29. O'Neill-Biba, M., Sivaprasad, S., Rodriguez-Carmona, M., Wolf, J.E. and Barbur, J.L. (Sep 2010). Loss of chromatic sensitivity in AMD and diabetes: A comparative study. Ophthalmic and Physiological Optics, 30(5), 705-716. doi: 10.1111/j.1475-1313.2010.00775.x
  30. Barbur, J.L., Konstantakopoulou, E., Rodriguez-Carmona, M., Harlow, J.A., Robson, A.G. and Moreland, J.D. (Sep 2010). The macular assessment profile test - A new VDU-based technique for measuring the spatial distribution of the macular pigment, lens density and rapid flicker sensitivity. Ophthalmic and Physiological Optics, 30(5), 470-483. doi: 10.1111/j.1475-1313.2010.00748.x
  31. Fick, W.H., Geyer, W.A. and Barbur, J. (Oct 2009). Control of common sunflower (Helianthus annuus) in artillery range trials at Ft. Riley, Kansas. Weed Technology, 23(4), 540-543. doi: 10.1614/WT-08-105.1
  32. Connolly, D.M. and Barbur, J.L. (Nov 2009). Low contrast acuity at photopic and mesopic luminance under mild hypoxia, normoxia, and hyperoxia. Aviation Space and Environmental Medicine, 80(11), 933-940. doi: 10.3357/ASEM.2535.2009
  33. Chisholm, C.M., Rauscher, F.G., Crabb, D.C., Davies, L.N., Dunne, M.C., Edgar, D.F., Harlow, J.A., James-Galton, M., Petzold, A., Plant, G.T., Viswanathan, A.C., Underwood, G.J. and Barbur, J.L. (Feb 2008). Assessing visual fields for driving in patients with paracentral scotomata. BRITISH JOURNAL OF OPHTHALMOLOGY, 92(2), 225-230. doi: 10.1136/bjo.2007.129726
  34. Chisholm, C.M., Rauscher, F.G., Crabb, D.C., Davies, L.N., Dunne, M.C., Edgar, D.F., Harlow, J.A., James-Galton, M., Petzold, A., Plant, G.T., Viswanathan, A.C., Underwood, G.J. and Barbur, J.L. (Feb 2008). Assessing visual fields for driving in patients with paracentral scotomata. British Journal of Ophthalmology, 92(2), 225-230. doi: 10.1136/bjo.2007.129726
  35. Rodríguez-Carmona, M., Sharpe, L.T., Harlow, J.A. and Barbur, J.L. (May 2008). Sex-related differences in chromatic sensitivity. Visual Neuroscience, 25(3), 433-440. doi: 10.1017/S095252380808019X
  36. Rodriguez-Carmona, M., Sharpe, L.T., Harlow, J.A. and Barbur, J. (2008). Sex-related differences in chromatic sensitivity. Vis Neurosci, 25, 433-440.
  37. Connolly, D.M., Barbur, J.L., Hosking, S.L. and Moorhead, I.R. (Feb 2008). Mild hypoxia impairs chromatic sensitivity in the mesopic range. Investigative Ophthalmology and Visual Science, 49(2), 820-827. doi: 10.1167/iovs.07-1004
  38. Dalimier, E., Dainty, J.C. and Barbur, J. (2008). Effects og higher-order aberrations on contrast acuity as a funstion of light level. Journal of Modern Optics, 55, 791-803.
  39. Dalimier, E., Dainty, C. and Barbur, J.L. (Feb 2008). Effects of higher-order aberrations on contrast acuity as a function of light level. Journal of Modern Optics, 55(4-5), 791-803. doi: 10.1080/09500340701469641
  40. Barbur, J.L. and Spang, K. (2008). Colour constancy and conscious perception of changes of illuminant. Neuropsychologia, 46(3), 853-863. doi: 10.1016/j.neuropsychologia.2007.11.032
  41. Barbur, J.L., Rodriguez-Carmona, M., Harlow, J.A., Mancuso, K., Neitz, J. and Neitz, M. (May 2008). A study of unusual Rayleigh matches in deutan deficiency. Visual Neuroscience, 25(3), 507-516. doi: 10.1017/S0952523808080619
  42. Moro, S.I., Rodriguez-Carmona, M.L., Frost, E.C., Plant, G.T. and Barbur, J.L. (Sep 2007). Recovery of vision and pupil responses in optic neuritis and multiple sclerosis. Ophthalmic and Physiological Optics, 27(5), 451-460. doi: 10.1111/j.1475-1313.2007.00501.x
  43. Walkey, H.C., Orreveteläinen, P., Barbur, J., Halonen, L., Goodman, T., Alferdinck, J., Freiding, A. and Szalmás, A. (2007). Mesopic visual efficiency II: Reaction time experiments. Lighting Research and Technology, 39(4), 335-354. doi: 10.1177/1477153507080920
  44. Barbur, J.L., Fahle, M. and Spang, K. (2007). Dichoptic studies of instantaneous colour constancy in human vision. PERCEPTION, 36, 189-189.
  45. Spang, K.M., Fahle, M. and Barbur, J. (2007). BOLD activations in response to changes in chromatic context - an investigation of instantaneous colour constancy mechanisms. PERCEPTION, 36, 199-199.
  46. Walker, G., Rodriguez-Carmona, M., Harlow, J. and Barbur, J. (2007). Selective absorption of short-wavelength light in the eye and its effect on yellow-blue chromatic sensitivity. PERCEPTION, 36, 201-201.
  47. Barbur, J., Walkey, H. and Walker, G. (2007). The assessment of visual performance in the mesopic range. PERCEPTION, 36, 122-123.
  48. Rauscher, F.G., Birzele, S., Boeggemann, M., Harlow, J.A. and Barbur, J. (2007). When is foveal 'crowding' abnormal?. PERCEPTION, 36, 41-41.
  49. Fahle, M.W., Barbur, J. and Spang, K. (2007). Visual cortex mirrors stimulus variations that remain unconscious. PERCEPTION, 36, 9-9.
  50. O'Neill-Biba, M.M., Plant, G.T., Rodriguez-Carmona, M., Thomson, W.D. and Barbur, J. (2007). The usefulness of colour vision assessment in subjects with diseases of the eye. PERCEPTION, 36, 197-197.
  51. Moro, S.I., Rodriguez-Carmona, M.L., Frost, E.C., Plant, G.T. and Barbur, J.L. (Sep 2007). Recovery of vision and pupil responses in optic neuritis and multiple sclerosis.. Ophthalmic Physiol Opt, 27(5), 451-460. doi: 10.1111/j.1475-1313.2007.00501.x
  52. Moro, S.I., Rodriguez-Carmona, M.L., Plant, G.T. and Barbur, J.L. (Nov 2007). Visual and pupil response deficits during optic neuritis and multiple sclerosis.. SPANISH JOURNAL OF PSYCHOLOGY, 10(2), 489-489.
  53. Walkey, H.C., Harlow, J.A. and Barbur, J.L. (May 2006). Changes in reaction time and search time with background luminance in the mesopic range. Ophthalmic and Physiological Optics, 26(3), 288-299. doi: 10.1111/j.1475-1313.2006.00412.x
  54. Walkey, H.C., Harlow, J.A. and Barbur, J.L. (May 2006). Changes in reaction time and search time with background luminance in the mesopic range.. Ophthalmic Physiol Opt, 26(3), 288-299. doi: 10.1111/j.1475-1313.2006.00412.x
  55. Walkey, H.C., Harlow, J.A. and Barbur, J.L. (Nov 2006). Characterising mesopic spectral sensitivity from reaction times. Vision Research, 46(25), 4232-4243. doi: 10.1016/j.visres.2006.08.002
  56. Walkey, H.C., Harlow, J.A. and Barbur, J.L. (Nov 2006). Characterising mesopic spectral sensitivity from reaction times.. Vision Res, 46(25), 4232-4243. doi: 10.1016/j.visres.2006.08.002
  57. Kvansakul, J., Rodriguez-Carmona, M., Edgar, D.F., Barker, F.M., Koepcke, W., Schalch, W. and Barbur, J.L. (Jul 2006). Supplementation with the carotenoids lutein or zeaxanthin improves human visual performance. OPHTHALMIC AND PHYSIOLOGICAL OPTICS, 26(4), 362-371. doi: 10.1111/j.1475-1313.2006.00387.x
  58. Rodriguez-Carmona, M., Kvansakul, J., Alister Harlow, J., Köpcke, W., Schalch, W. and Barbur, J.L. (Mar 2006). The effects of supplementation with lutein and/or zeaxanthin on human macular pigment density and colour vision. Ophthalmic and Physiological Optics, 26(2), 137-147. doi: 10.1111/j.1475-1313.2006.00386.x
  59. Rodriguez-Carmona, M., Kvansakul, J., Harlow, J.A., Kopcke, W., Schalch, W. and Barbur, J.L. (Mar 2006). The effects of supplementation with lutein and/or zeaxanthin on human macular pigment density and colour vision. OPHTHALMIC AND PHYSIOLOGICAL OPTICS, 26(2), 137-147. doi: 10.1111/j.1475-1313.2006.00386.x
  60. Kvansakul, J., Rodriguez-Carmona, M., Edgar, D.F., Barker, F.M., Köpcke, W., Schalch, W. and Barbur, J.L. (Jul 2006). Supplementation with the carotenoids lutein or zeaxanthin improves human visual performance. Ophthalmic and Physiological Optics, 26(4), 362-371. doi: 10.1111/j.1475-1313.2006.00387.x
  61. Barbur, J.L., DeCunha, D. and Spang, K. (2006). Dichoptic studies of instantaneous colour constancy in human vision. CGIV 2006 - 3rd European Conference on Colour in Graphics, Imaging, and Vision, Final Program and Proceedings, 137-139.
  62. Walkey, H.C. and Barbur, J.L. (May 2006). Guest editorial: Shedding new light on the twilight zone. Ophthalmic and Physiological Optics, 26(3), 223-224. doi: 10.1111/j.1475-1313.2006.00420.x
  63. Squire, T.J., Rodriguez-Carmona, M., Evans, A.D.B. and Barbur, J.L. (May 2005). Color vision tests for aviation: Comparison of the anomaloscope and three lantern types. Aviation Space and Environmental Medicine, 76(5), 421-429.
  64. Walkey, H.C., Barbur, J.L., Harlow, J.A., Hurden, A., Moorhead, I.R. and Taylor, J.A.F. (2005). Effective contrast of colored stimuli in the mesopic range: A metric for perceived contrast based on achromatic luminance contrast. Journal of the Optical Society of America A: Optics and Image Science, and Vision, 22(1), 17-28. doi: 10.1364/JOSAA.22.000017
  65. Walkey, H.C., Barbur, J.L., Harlow, J.A., Hurden, A., Moorhead, I.R. and Taylor, J.A.E. (Jan 2005). Effective contrast of colored stimuli in the mesopic range: a metric for perceived contrast based on achromatic luminance contrast. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 22(1), 17-28. doi: 10.1364/JOSAA.22.000017
  66. Barbur, J.L. (2004). 'Double-blindsight' revealed through the processing of color and luminance contrast defined motion signals. Progress in Brain Research, 144, 243-259. doi: 10.1016/S0079-6123(03)14417-2
  67. Barbur, J.L., De Cunha, D., Williams, C.B. and Plant, G. (Jan 2004). Study of instantaneous color constancy mechanisms in human vision. Journal of Electronic Imaging, 13(1), 15-28. doi: 10.1117/1.1636491
  68. Barbur, J., Rodriguez-Carmona, M.L. and Harlow, J.A. (2004). A study of parameters that affect the outcome of the Rayleigh match. PERCEPTION, 33, 60-60.
  69. De Cunha, D.A., Eadie, L.H., Barbur, J.L., Hawkes, D.J. and Seifalian, A.M. (Oct 2004). The effect of image colour distortion on evaluation of donor liver suitability for transplantation. Computers in Biology and Medicine, 34(7), 615-632. doi: 10.1016/j.compbiomed.2003.10.001
  70. Barbur, J.L., Moro, S., Harlow, J.A., Lam, B.L. and Liu, M. (Nov 2004). Comparison of pupil responses to luminance and colour in severe optic neuritis.. Clin Neurophysiol, 115(11), 2650-2658. doi: 10.1016/j.clinph.2004.05.022
  71. Chisholm, C.M., Evans, A.D.B., Harlow, J.A. and Barbur, J.L. (01 May 2003). New test to assess pilot's vision following refractive surgery. Aviation Space and Environmental Medicine, 74(5 I), 551-559.
  72. Chisholm, C.M., Evans, A.D.B., Harlow, J.A. and Barbur, J.L. (May 2003). New test to assess pilot's vision following refractive surgery. AVIATION SPACE AND ENVIRONMENTAL MEDICINE, 74(5), 551-559.
  73. Barbur, J.L., Prescott, N.B., Douglas, R.H., Jarvis, J.R. and Wathes, C.M. (2002). A comparative study of stimulus-specific pupil responses in the domestic fowl (Gallus gallus domesticus) and the human. Vision Research, 42(2), 249-255. doi: 10.1016/S0042-6989(01)00279-6
  74. Barbur, J.L., De Cunha, D., Williams, C.B. and Plant, G. (2002). Experimental studies of instantaneous colour constancy - Dynamic colour matching under rapid changes of illuminant. Proceedings of SPIE - The International Society for Optical Engineering, 4662, 298-314. doi: 10.1117/12.469526
  75. Wilhelm, B.J., Wilhelm, H., Moro, S. and Barbur, J.L. (01 Oct 2002). Pupil response components: Studies in patients with Parinaud's syndrome. Brain, 125(10), 2296-2307.
  76. Barbur, J.L., Prescott, N.B., Douglas, R.H., Jarvis, J.R. and Wathes, C.M. (Jan 2002). A comparative study of stimulus-specific pupil responses in the domestic fowl (Gallus gallus domesticus) and the human.. Vision Res, 42(2), 249-255.
  77. Wilhelm, B.J., Wilhelm, H., Moro, S. and Barbur, J.L. (Oct 2002). Pupil response components: studies in patients with Parinaud's syndrome.. Brain, 125(Pt 10), 2296-2307.
  78. Moro, S.I., Barbur, J.L. and Harlow, J.A. (2001). Light reflex component mechanisms revealed in studies of the pupil response. PERCEPTION, 30, 87-87.
  79. Walkey, H.C., Barbur, J.L., Harlow, J.A. and Makous, W. (2001). Measurements of chromatic sensitivity in the mesopic range. Color Research and Application, 26(SUPPL.).
  80. Knoblauch, K., Vital-Durand, F. and Barbur, J.L. (2001). Variation of chromatic sensitivity across the life span. Vision Research, 41(1), 23-36. doi: 10.1016/S0042-6989(00)00205-4
  81. Hurden, A., Smith, P., Evans, G., Harlow, A., Bunting, A. and Barbur, J. (1999). Visual performance at mesopic light levels: An empirical model. Lighting Research and Technology, 31(3), 127-131.
  82. Weiskrantz, L., Cowey, A. and Barbur, J.L. (Aug 1999). Differential pupillary constriction and awareness in the absence of striate cortex. Brain, 122(8), 1533-1538. doi: 10.1093/brain/122.8.1533
  83. Barbur, J.L., Weiskrantz, L. and Harlow, J.A. (28 Sep 1999). The unseen color aftereffect of an unseen stimulus: Insight from blindsight into mechanisms of color afterimages. Proceedings of the National Academy of Sciences of the United States of America, 96(20), 11637-11641. doi: 10.1073/pnas.96.20.11637
  84. Barbur, J.L., Weiskrantz, L. and Harlow, J.A. (28 Sep 1999). The unseen color aftereffect of an unseen stimulus: insight from blindsight into mechanisms of color afterimages.. Proc Natl Acad Sci U S A, 96(20), 11637-11641.
  85. Barbur, J.L., Sahraie, A., Simmons, A., Weiskrantz, L. and Williams, S.C.R. (Nov 1998). Residual processing of chromatic signals in the absence of a geniculostriate projection. Vision Research, 38(21), 3447-3453. doi: 10.1016/S0042-6989(98)00147-3
  86. Barbur, J.L., Sahraie, A., Simmons, A., Weiskrantz, L. and Williams, S.C. (Nov 1998). Residual processing of chromatic signals in the absence of a geniculostriate projection.. Vision research, 38(21), 3347-3353.
  87. Barbur, J.L., Wolf, J. and Lennie, P. (07 Dec 1998). Visual processing levels revealed by response latencies to changes in different visual attributes. Proceedings of the Royal Society B: Biological Sciences, 265(1412), 2321-2325.
  88. Hennelly, M.L., Barbur, J.L., Edgar, D.F. and Woodward, E.G. (Mar 1998). The effect of age on the light scattering characteristics of the eye. OPHTHALMIC AND PHYSIOLOGICAL OPTICS, 18(2), 197-203. doi: 10.1046/j.1475-1313.1998.00333.x
  89. Hennelly, M.L., Barbur, J.L., Edgar, D.F. and Woodward, E.G. (Mar 1998). The effect of age on the light scattering characteristics of the eye. Ophthalmic and Physiological Optics, 18(2), 197-203. doi: 10.1016/S0275-5408(97)00077-X
  90. Gamlin, P.D.R., Zhang, H., Harlow, A. and Barbur, J.L. (Nov 1998). Pupil responses to stimulus color, structure and light flux increments in the rhesus monkey. Vision Research, 38(21), 3353-3358. doi: 10.1016/S0042-6989(98)00096-0
  91. Weiskrantz, L. and Barbur, J.L. (1998). Measuring the unseen aftereffect of an unseen stimulus in blindsight. PERCEPTION, 27, 22-22.
  92. Sahraie, A., Weiskrantz, L. and Barbur, J.L. (Nov 1998). Awareness and confidence ratings in motion perception without geniculo- striate projection. Behavioural Brain Research, 96(1-2), 71-77. doi: 10.1016/S0166-4328(97)00194-0
  93. Pelah, A. and Barbur, J.L. (1998). Adaptation to visual motion and self-motion in the absence of V1. PERCEPTION, 27, 22-22.
  94. Barbur, J.L., Gamlin, P.D.R., Harlow, J.A., Wood, G. and Wolf, J.E. (1998). Comparison of pupil responses in man and monkey. PERCEPTION, 27, 5-5.
  95. Sahraie, A., Weiskrantz, L., Barbur, J.L., Simmons, A., Williams, S.C.R. and Brammer, M.J. (19 Aug 1997). Pattern of neuronal activity associated with conscious and unconscious processing of visual signals. Proceedings of the National Academy of Sciences of the United States of America, 94(17), 9406-9411. doi: 10.1073/pnas.94.17.9406
  96. Sahraie, A. and Barbur, J.L. (1997). Pupil response triggered by the onset of coherent motion. Graefe's Archive for Clinical and Experimental Ophthalmology, 235(8), 494-500. doi: 10.1007/BF00947006
  97. Sahraie, A., Weiskrantz, L. and Barbur, J.L. (1997). Awareness and confidence ratings in motion discrimination. PERCEPTION, 26, 73-74.
  98. Barbur, J.L., Hull, C.C., Wakefield, M. and Welford, W.T. (Feb 1997). A novel method for the photometric evaluation of searchlights. Measurement Science and Technology, 8(2), 117-122. doi: 10.1088/0957-0233/8/2/002
  99. Barbur, J.L., Cole, V.A., Sahraie, A., Simmons, A., Weiskrantz, L. and Williams, S.C.R. (1997). A study of pupil responses in a subject with damaged primary visual cortex. Investigative Ophthalmology and Visual Science, 38(4).
  100. Smith, P., Evans, G., Harlow, A., Hürden, A. and Barbur, J.L. (1997). A study of mesöpic visual performance. Investigative Ophthalmology and Visual Science, 38(4).
  101. Barbur, J.L., Cole, V.A. and Plant, G. (1996). Selective loss of 'green' sensitivity in a subject with damaged ventral occipito-temporal cortex. PERCEPTION, 25, 103-103.
  102. Sahraie, A., Barbur, J.L., Edgar, D.F. and Weiskrantz, L. (1996). Motion discrimination of single targets: Comparison of preliminary findings in normal subjects and patients with glaucoma. Graefe's Archive for Clinical and Experimental Ophthalmology, 234(9), 553-560.
  103. Barbur, J.L., Cole, V.A. and Harlow, A.J. (15 Feb 1996). Investigation of pupil light reflex response components: Spatial summation & contrast gain. Investigative Ophthalmology and Visual Science, 37(3).
  104. Sahraie, A., Barbur, J.L., Edgar, D.F. and Weiskrantz, L. (Sep 1996). Motion discrimination of single targets: Comparison of preliminary findings in normal subjects and patients with glaucoma. GRAEFES ARCHIVE FOR CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY, 234(9), 553-560. doi: 10.1007/BF00448799
  105. Barbur, J.L. and Sahraie, A. (1995). Motion detection of single targets: spatial and temporal requirements. PERCEPTION, 24, 106-107.
  106. Weiskrantz, L., Barbur, J.L. and Sahraie, A. (20 Jun 1995). Parameters affecting conscious versus unconscious visual discrimination with damage to the visual cortex (V1). Proceedings of the National Academy of Sciences of the United States of America, 92(13), 6122-6126. doi: 10.1073/pnas.92.13.6122
  107. COLE, V., BARBUR, J. and HARLOW, A. (15 Mar 1995). PUPIL LIGHT REFLEX COMPONENTS ISOLATED USING LUMINANCE CONTRAST AND LIGHT-FLUX MASKING TECHNIQUES. INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE, 36(4), S940-S940.
  108. BARBUR, J., COLE, V., HARLOW, A. and SABRAIE, A. (15 Mar 1995). PUPIL COLOR AND LIGHT REFLEX RESPONSES IN THE PERIPHERY OF THE VISUAL-FIELD. INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE, 36(4), S660-S660.
  109. KNOBLAUCH, K., BARBUR, J. and VITALDURAND, F. (15 Mar 1995). DEVELOPMENT AND AGING OF CHROMATIC SENSITIVITY. INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE, 36(4), S910-S910.
  110. Barbur, J.L., Hess, R.F. and Pinney, H.D. (1994). Pupillary function in human amblyopia. Ophthalmic and Physiological Optics, 14(2), 139-149.
  111. Barbur, J.L., Harlow, A.J. and Weiskrantz, L. (29 Jan 1994). Spatial and temporal response properties of residual vision in a case of hemianopia. Philosophical Transactions of the Royal Society B: Biological Sciences, 343(1304), 157-166.
  112. Barbur, J.L., Harlow, A.J. and Plant, G.T. (1994). Insights into the different exploits of colour in the visual cortex. Proceedings of the Royal Society B: Biological Sciences, 258(1353), 327-334. doi: 10.1098/rspb.1994.0181
  113. Lepropre, M., Monot, I., Delamare, M.P., Hervieu, M., Simon, C., Provost, J., Desgardin, G., Raveau, B., Barbur, J.M., Bourgault, D. and Braithwaite, D. (1994). Critical currents up to 71 000 A cm-2 at 77 K in melt textured YBCO doped with BaSnO3 . Cryogenics, 34(1), 63-67. doi: 10.1016/0011-2275(94)90054-X
  114. Knoblauch, K., Vital-Durand, F. and Barbur, J. (1994). Development of chromatic sensitivity along cone-isolating axes. PERCEPTION, 23, 4-4.
  115. Barbur, J.L., Watson, J.D.G., Frackowiak, R.S.J. and Zeki, S. (Dec 1993). Conscious visual perception without V1. Brain, 116(6), 1293-1302.
  116. Weiskrantz, L., Barbur, J.L. and Harlow, A.J. (1992). Spatiotemporal frequency response characteristics in a hemianope (evidence for two separate channels). Ophthalmic and Physiological Optics, 12(1), 99-99.
  117. Barbur, J.L., Birch, J. and Harlow, A.J. (1992). The measurement of colour discrimination using psychophysical and pupillometric methods. Ophthalmic and Physiological Optics, 12(1), 82-83.
  118. Barbur, J.L. and Harlow, A. (1992). Pupil responses to grating stimuli (equal and lower luminance gratings). Ophthalmic and Physiological Optics, 12(1), 82-82.
  119. Barbur, J.L., Harlow, A.J. and Sahraie, A. (1992). Pupillary responses to stimulus structure, colour and movement. Ophthalmic and Physiological Optics, 12(2), 137-141.
  120. Birch, J., Barbur, J.L. and Harlow, A.J. (1992). New method based on random luminance masking for measuring isochromatic zones using high resolution colour displays. Ophthalmic and Physiological Optics, 12(2), 133-136.
  121. Barbur, J.L. (1991). Pupillary responses to grating stimuli. Journal of Psychophysiology, 5(3), 259-263.
  122. Alexandridis, E., Leendertz, J.A. and Barbur, J.L. (1991). Methods for studying the behaviour of the pupil. Journal of Psychophysiology, 5(3), 223-239.
  123. Weiskrantz, L., Harlow, A. and Barbur, J.L. (1991). Factors affecting visual sensitivity in a hemianopic subject. Brain, 114(5), 2269-2282.
  124. Barbur, J.L. and Harlow, A.J. (1990). Pupillary responses to stimulus structure and colour-possible mechanisms. PERCEPTION, 19(4), 412-412.
  125. Barbur, J.L., Harlow, A.J. and Weiskrantz, L. (1990). Factors affecting residual visual sensitivity in a case of hemianopia. PERCEPTION, 19(4), 364-364.
  126. Barbur, J.L. (1988). Spatial frequency specific measurements and their use in clinical psychophysics. Clinical Vision Sciences, 2(3), 225-233.
  127. Barbur, J.L., Forsyth, P.M. and Findlay, J.M. (1988). Human saccadic eye movements in the absence of geniculocalcarine projection. Brain, 111(1), 63-82.
  128. Barbur, J.L. and Thomson, W.D. (1987). Pupil response as an objective measure of visual acuity. Ophthalmic and Physiological Optics, 7(4), 425-429.
  129. Barbur, J.L., Thomson, W.D. and Forsyth, P.M. (1987). A new system for the simultaneous measurement of pupil size and two-dimensional eye movements. Clinical Vision Sciences, 2(2), 131-142.
  130. Barbur, J.L., Dunn, G.M. and Wilson, J.A. (Nov 1986). The perception of moving comets at high retinal illuminance levels: A rod-cone interaction effect. Biological Cybernetics, 55(2-3), 145-158. doi: 10.1007/BF00341930
  131. Barbur, J.L., Hoban, B. and Thomson, D. (1986). A new photographic-based system for the measurement of contrast sensitivity. Ophthalmic and Physiological Optics, 6(4), 407-414.
  132. Barbur, J.L. (1985). Speed discrimination and its relation to involuntary eye movements in human vision. Neuroscience Letters, 54(1), 7-12.
  133. Barbur, J.L. and Saunders, J.E. (1985). Displacement thresholds for motion detection under conditions of chromatic adaptation. Ophthalmic and Physiological Optics, 5(1), 5-13.
  134. Barbur, J.L. (1982). Reaction-time determination of the latency between visual signals generated by rods and cones. Ophthalmic and Physiological Optics, 2(3), 179-185.
  135. Barbur, J.L., Holliday, I.E. and Ruddock, K.H. (1981). The spatial and temporal organisation of motion perception units in human vision. Acta Psychologica, 48(1-3), 35-47. doi: 10.1016/0001-6918(81)90046-9
  136. Barbur, J.L. (1981). Subthreshold addition of real and apparent motion. Vision Research, 21(4), 557-564. doi: 10.1016/0042-6989(81)90101-2
  137. Barbur, J.L., Holliday, I.E., Ruddock, K.H. and Waterfield, V.A. (1980). Spatial characteristics of movement detection mechanisms in human vision. III. Subjects with abnormal visual pathways. Biological Cybernetics, 37(2), 99-105.
  138. Barbur, J.L. and Ruddock, K.H. (1980). Spatial characteristics of movement detection mechanisms in human vision. II. Chromatic stimuli. Biological Cybernetics, 37(2), 93-98.
  139. Barbur, J.L. (1980). Quantitative studies of some dynamic visual effects. Perception, 9(3), 303-316.
  140. Barbur, J.L. and Ruddock, K.H. (1980). Spatial characteristics of movement detection mechanisms in human vision. I. Achromatic vision. Biological Cybernetics, 37(2), 77-92.
  141. Barbur, J.L., Ruddock, K.H. and Waterfield, V.A. (1980). Human visual responses in the absence of the geniculo-calcarine projection. Brain, 103(4), 905-928.
  142. Barbur, J.L., Ruddock, K.H. and Waterfield, V.A. (1979). A colour-dependent abnormality in human visual detection of stimulus motion and spatial structure. Neuroscience Letters, 15(2-3), 307-312. doi: 10.1016/0304-3940(79)96131-7

Chapter (2)

  1. Rodriguez-Carmona, M. and Barbur, J.L. (2012). Variability in normal and defective colour vision: consequences for occupational environments. Best, J. (Ed.), Colour design (pp. 24-82) Cambridge, UK: Woodhead Publishing Limited.
  2. Barbur, J. and Stockman, A. (). Photopic, Mesopic and Scotopic Vision and Changes in Visual Performance. Dartt, D., Besharse, J.C. and Dana, R. (Ed.), (pp. 323-331) Elsevier.

Conference (5)

  1. Plant, G., Barbur, J., Jindahra, P. and Bridge, H. (Nov 2010). DEMONSTRATION OF OPTIC TRACT ATROPHY IN HEMIANOPIA BY MAGNETIC RESONANCE IMAGING: CONFIRMATION OF RETROGRADE TRANS-SYNAPTIC DEGENERATION IN THE HUMAN VISUAL PATHWAY. , doi: 10.1136/jnnp.2010.226340.110
  2. Barbur, J.L., Konstantakopoulou, E., Rodriguez-Carmona, M., Harlow, J.A., Robson, A.G. and Moreland, J.D. (Sep 2010). The Macular Assessment Profile test - a new VDU-based technique for measuring the spatial distribution of the macular pigment, lens density and rapid flicker sensitivity.. , England. doi: 10.1111/j.1475-1313.2010.00748.x
  3. Rodriguez-Carmona, M., Sharpe, L.T., Harlow, J.A. and Barbur, J.L. (2008). Sex-related differences in chromatic sensitivity. , doi: 10.1017/S095252380808019X
  4. Barbur, J.L., Rodriguez-Carmona, M., Harlow, J.A., Mancuso, K., Neitz, I. and Neitz, M. (2008). A study of unusual Rayleigh matches in deutan deficiency. , doi: 10.1017/S0952523808080619
  5. Chisholm, C.M., Anderson, D.F., Kvansakul, J., Khan, A., Gartry, D.S. and Barbur, J. (Apr 2004). Prospective, randomised, double-masked study of conventional versus wavefront-guided LASIK: Visual performance outcomes. ,

Education

- Responsible for the photometry / colorimetry and lighting sub-modules
- Responsible for associated laboratory sessions
- Responsible for supervision of several 3rd year special studies

Modules taught

- Optometry BSc Part I

Other Activities

Events/Conferences Attended (9)

  • Selective Processing of Colour Categories and Other Stimulus Attributes in the Cortex - evidence from clinical studies, Tucson, AZ 2005, Optical Society of America Vision Meeting
  • A study of the variables that affect the parameters of the Rayleigh match, Belem, Brazil 2007, International Colour Vision Society
  • Colour vision assessment in patients with acquired loss of chromatic sensitivity, Belem, Brazil 2007, International Colour Vision Society
  • Factors that limit chromatic sensitivity in normal trichromacy and congenital deficiency, Rochester, NY 2008, Optical Society of America Vision Meeting
  • Variability in chromatic sensitivity in normal colour vision and in congenital deficiency, Braga, Portugal 2009, International Colour Vision Society,
  • Effects of hypoxia on contrast acuity, colour vision and the pupil response, Lyon, France 2010, International Neuro-Ophthalmological Society
  • The contribution of the rod / melanopsin ganglion cells to the dynamic pupil light reflex response, Tuebingen, Germany 2011, International Pupil Colloquium
  • The Colour Assessment and Diagnosis System, Mar 2012, United Kingdom Neuro-Ophthalmology Special Interest Group
  • Clinical applications of colour assessment - separating the effects of aging and disease, Kongsberg, Norway Sep 2011, International Colour Vision Society

Keynote Lectures/Speeches (42)

  • Learning from the pupil - Studies of basic mechanisms and clinical applications, 2001, Monterey, USA. Keynote lecture: \"The Loewenfeld Lecture\" - International Pupil Colloquium
  • Light scatter in the human eye and its effect on visual performance, , Aberdeen, UK. Invited lecture: Medical Physics Dept, Aberdeen University
  • Colour Assessment & Diagnosis - the new CAD test, 2004, Oxford, UK. Invited lecture: The Association of Aviation Medical Examiners
  • Learning from the pupil - studies of basic mechanisms and clinical applications, 2005, London. Keynote lecture: GlaxoSmithKline Advanced Lectures on Clinical and Experimental Neurology, UCL
  • The assessment of visual performance in the mesopic range, 2005, Tucson, AZ. Invited lecture: Optical Society of America Vision Meeting
  • What the eye cannot see!, 2006, Reading, UK. Invited lecture: Royal Television Society Thames Valley Centre Technical Colloquium
  • Colour vision and the conspicuity of flashing lights, 2006, Teddington, UK. Invited lecture: National Physical Laboratory
  • Establishing the statistical limits of normal chromatic sensitivity, 2006, Ottawa, Canada. Invited lecture: Inter Society Colour Council
  • Cortical modulation of retinal signals that drive pupil responses in man, 2006, Tokyo, Japan. Invited lecture: International Neuro-Ophthalmological Society
  • Recovery of visual and pupil response deficits in multiple sclerosis and optic neuritis, 2007, Hamamatsu, Japan. Invited lecture: International Pupil Colloquium
  • The variability of colour vision: a study of parameters that affect chromatic sensitivity, 2008, Boston, USA. Invited lecture: Aerospace Medical Association (AsMA)
  • Rapid procedure for colour vision screening and assessment of colour vision loss suitable for certification within demanding occupational environments, 2009, Los Angeles, USA. Invited lecture: Aerospace Medical Association (AsMA)
  • Pre-receptoral spectral absorption, healthy ageing and pre-clinical indications of retinal disease, 2009, Terrassa, Spain. Invited lecture: Universitat Politecnica Catalunya
  • Setting minimum colour vision requirements within visually-demanding occupational environments, 2009, Utrecht, Netherlands. Keynote lecture: The International Union of Railway Medical services
  • Work that led to the CAD test Pass / Fail limits for aviation, 2010, Abu Dhabi, UAE. Invited lecture: Etihad Airways
  • Estimating the efficiency of the CAD test when used in aviation, 2010, Phoenix, AZ, USA. Invited lecture: Aerospace Medical Association (AsMA)
  • Analysis of European colour vision certification requirements for air traffic controllers, 2010, Phoenix, AZ. Invited lecture: Aerospace Medical Association (AsMA)
  • Visual performance in the mesopic range, 2010, London, UK. Keynote lecture: \"Trotter-Paterson Memorial Lecture\" The Chartered Institution of Building Services Engineers
  • Colour vision screening and assessment of colour vision loss suitable for certification within the aviation environment, 2010, Seeheim. Invited lecture: German Aerospace Medical Society Meeting
  • Colour Vision - Fundamental studies and clinical applications, 2010, Arnhem, Holland. Keynote lecture: Netherlands Society of Occupational Health
  • Colour Vision and Visual Acuity, 2010, London, UK. Keynote lecture: Maritime and Coastguard Agency Annual Meeting
  • Colour assessment using the CAD test - description of the work that led to the CAD pass / fail limits for aviation, 2011, Dubai, UAE. Invited lecture: Emirates Airways
  • Clinical applications of colour vision assessment - separating the effects of aging and disease, 2011, Anchorage Alaska, USA. Invited lecture: Aerospace Medical Association (AsMA)
  • Assessing the severity of colour vision loss in congenital deficiency, 2011, Anchorage Alaska, USA. Invited lecture: Aerospace Medical Association (AsMA)
  • Aging, AMD and the pupil response, 2011, Giessen, Germany. Invited lecture: Universitätsklinikum Gießen und Marburg
  • Colour vision assessment in aviation, 2011, Seeheim. Keynote lecture: The Berblinger Prize Lecturer (German Academy of Aerospace Meeting)
  • Colour vision assessment in aviation -Standards and certification procedures, 2011, Santander, Spain. Invited lecture: Spanish Aerospace Medical Society
  • Variability in colour vision - Separating normal aging from disease, 2011, Oxford, UK. Invited lecture: Experimental Psychology, University of Oxford
  • Scattered light, glare and visual performance, 2011, Teddington, UK. Invited lecture: National Physical Laboratory
  • Clinical applications of colour assessment - separating the effects of aging and disease, Jul 2011, Cambridge, UK. Invited lecture: Macular Carotenoids - AMD Meeting
  • Changes in visual function in AMD and mild hypoxia, Feb 2012, Cardiff, UK. Invited lecture: School of Optometry & Vision Sciences, Cardiff University
  • Light flux detection in human vision - the role of the rod / melanopsin ganglion cells, Jan 2012, Oxford, UK. Invited lecture: Clinical Neuroscience Dept., University of Oxford
  • Colour vision in Aviation Course, Mar 2012, Oslo, Norway. Invited lecture: Institute of Aviation Medicine
  • Scattered Light, Glare and Visual Performance, Jun 2012, . Invited Lecture: Euro-LED 2012 Conference
  • Colour vision mechanisms and the factors that cause variability in normal and deficient colour vision, Oct 2012, . Invited lecture: Royal Society of Medicine- Annual Defence Services Ophthalmology Meeting
  • Establishing minimum colour vision requirements in visually-demanding occupational environments, Oct 2012, . Invited lecture: Royal Society of Medicine - Colt Foundation Annual Meeting
  • Colour in Business and the Professions, Nov 2012, . Invited lecture: Colour Group (GB) - City University London
  • The use of advanced colour assessment for early detection of retinal disease, Oct 2012, . Invited lecture: Leipzig University Eye Clinics
  • Quantifying variability and changes caused by normal aging in normal trichromacy and congenital deficiency, Jan 2013, . Invited David Palmer Lecture at the Institute of Ophthalmology: Colour Group (GB)
  • Vision standards for visually demanding occupational environments with emphasis on colour vision, Jun 2013, . Invited keynote lecture: Society of Occupational Medicine's Annual Scientific Meeting
  • Clinical relevance of advances in vision science during the last ten years, 2013, Braga, Portugal. Invited keynote speaker: International Conference of Optometry and Visual Science
  • Minimising variability in colour vision - consequences for occupational environments, Sep 2013, Florence, Italy. Invited keynote speaker: IX Conferenza del Colore.