Comparing fast threshold Visual Fields between the Henson Pro and Humfrey Visual Field Analyser

Ms Angela Gulati

Automated perimetry for the investigation of visual fields has, in recent years, become a routine part of optometric practice. Many modern instruments such as the Henson Pro are most commonly used for supra threshold testing where the software provides quick analysis of the results. In hospital eye departments across the UK, slower, more detailed threshold strategies are more commonly employed.

Previous comparative studies have drawn conclusions on a range of differing instruments or have investigated variations in different test strategies on the same instrument.  This study assessed differences in interpretation of visual field plots obtained using the Henson Pro Fast Threshold 24-2 and the Humfrey Central 24-2 Fastpac.

Comparisons will be made on test duration, subjective assessment, fixation losses, sensitivity and specificity, threshold centrally and at predetermined locations, and mean and pattern deviation.

Ms Gulati was awarded an MSc following successful completion of this project. She is currently writing up her results for publication.