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The aim of this research programme is to study the limits of functional, diffraction-limited vision with emphasis on development of novel instrumentation and techniques to separate the effects of scattered light and aberrations.
The development of novel instrumentation and measurement techniques that allow the rapid and accurate measurement of the amount and angular distribution of light scattered in the eye, and the real-time measurement and correction of aberrations in the eye. The unambiguous separation of the effects of scattered light and aberrations on the point spread function of the eye.
Collaborators in this work are Chris Dainty (Applied Optics Group, Imperial College, London) and Pablo Artal (Universidad de Murcia, Spain).
The effects of corneal refractive surgery on functional visual performance. This project is supported by the College of Optometrists and aims to quantify the increased scattered light and aberrations in the eye caused by corneal refractive surgery (principally PRK and LASIK) and how the corresponding changes in retinal image quality affect functional visual performance. The project aims to develop and measure appropriate indices that describe and distinguish between changes in visual performance caused by increased scattered light and those caused by aberrations.
The investigation of functional visual performance using psychophysical techniques with a system that incorporates adaptive optics to correct (or to vary at will) the aberrations of the eye.
The development of a pass / fail test for assessing visual performance in pilots. See Barbur et al. (2001) for more information.
The application of objective light scatter measurement in the eye to study and monitor the effects of ageing, time course of disease, drug therapy or the outcome of ocular surgery.
E. Berrio, J.L. Barbur, J. A. Harlow & P. Artal (2001) Retinal image quality and visual performance separting the effcets of scattered light and aberrations. IOVS (submitted).
J. L. Barbur, C. Chisholm, D. F. Edgar and J. A. Harlow (2001) Pass / Fail test for assessing visual performance following corneal refractive surgery. Non-invasive Assessment of the Visual System (Technical Digest Series). Vol. 1, p , Optical Society of America, Washington DC.
Chisholm, C.M., Barbur, J.L., Edgar, D.F. & Thomson, W.D. (2000). The effect of excimer laser refractive surgery on visual performance. Investigative Ophthalmology & Visual Science 41, S462.
Edgar, D.F., Hennelly, M.L. & Barbur, J.L. (2000). Factors affecting the accuracy of light scatter measurements in human vision. Investigative Ophthalmology & Visual Science 41, S3.
Barbur, J.L., Chisholm, C.M., and Harlow, A.J. (1999). Effects of increased scattered light on visual performance. In Non-invasive Assessment of the Visual System (Technical Digest Series). 1, 6-9. Optical Society of America, Washington DC.
Barbur, J.L., Hull, C.C., Wakefield, M. & Welford, W.T. (1997). A novel method for the photometric evaluation of search lights. Meas.Sci.Technol. 8, 117-122.
Hennelly, M.L., Barbur, J.L., Edgar, D.F. & Woodward, E.G. (1997). Factors affecting the integrated straylight parameter in the normal human eye. Investigative Ophthalmology & Visual Science 38, 1014.
Hennelly, M.L., Barbur, J.L., Edgar, D.F. & Woodward, E.G. (1997). The light scattering characteristics of the eye. Ophthalmic & Physiological Optics 17, 171.
Barbur, J.L., Edgar, D.F., and Woodward, E.G. (1995). Measurement of the scattering characteristics of the eye in relation to pupil size. In Non-invasive Assessment of the Visual System (Technical Digest Series), Vol. 1, 250-253. 1995. Optical Society of America, Washington DC.
Edgar, D.F., Barbur, J.L. & Woodward, E.G. (1995). Pupil size measurements in relation to light scatter in the eye. Investigative Ophthalmology & Visual Science 36, 938-938.
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John Barbur | Chris Hull | David Edgar | Roger Buckley | Michael Morgan Applied Vision Research Centre | Clinical and Physiological Optics |
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