Macular colour contrast sensitivity in ocular hypertension and glaucoma: Evidence for two types of defect

• Type: Article in International Scientific Journal
• Date: 1991

Authors

Falcão-Reis F (Author) FMUP; O'Sullivan, F (Author) Other; Spileers, W (Author) Other; Hogg, C (Author) Other; Arden, GB (Author) Other

Journal

Title: British Journal of Ophthalmology

Vol. 75

Pages: 598-602

ISSN: 0007-1161

Publisher: BMJ PUBLISHING GROUP

Indexing

Scopus - 15 Citations

Other information

Authenticus ID: P-008-PS3

Abstract (EN): Colour contrast sensitivity (CCS) of a large cohort of glaucomatous patients, ocular hypertensive patients (OH), and normal persons was measured at six-month intervals during a two-year period. The OHs were graded into high, medium, and low risk groups. 69% of glaucomatous patients and 32% of all OHs had CCS thresholds greater than the mean plus 2 SDs of the controls. Satisfactory specificity and sensitivity could not be obtained by adjusting the criterion of threshold. In abnormal eyes, progressive small increases of threshold occurred during the study, but glaucomatous eyes with normal thresholds on the first visit retained normal thresholds in the subsequent visits. Although our system is very sensitive and precise, the proportion of abnormalities detected is no greater than with other techniques. In some glaucomatous patients there is a true preservation of colour vision which does not merely reflect the limitations of the test employed.

Language: English

Type (Professor's evaluation): Scientific