Use this URL to cite or link to this record in EThOS:
Title: Clinical applications of an automated test of colour vision.
Author: Tregear, Stephen James.
ISNI:       0000 0001 3536 1971
Awarding Body: University of Sussex
Current Institution: University of Sussex
Date of Award: 1995
Availability of Full Text:
Access from EThOS:
The early detection of acquired losses of colour vision can provide the ophthalmologist with a very sensitive indicator of visual dysfunction. As a result we have developed and tested an automated, CRT-based, chromatic discrimination system that allows us to measure acquired colour-vision deficits with great precision. This system, known as the Sussex Gratings Machine, can produce chromatic stimuli in any direction in equal luminance colour space. However, we have found that measurements made along a constant MIL-cone axis (Tritan) or a constant S-cone (Red/Green) confusion axis are most useful. Using this system we have investigated acquired colour vision deficits in diabetes ,. and thyroid eye disease. We have shown that tritan discrimination losses can be used to screen for severe diabetic retinopathy and also to predict those who are likely to develop it within 18 months. We have also confirmed that acquired tritan discrimination losses are a very useful indicator of optic-nerve compression in thyroid eye disease.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Diabetic retinopathy; Thyroid eye disease