PERIPHERAL CONTRAST SENSITIVITY IN GLAUCOMA AND OCULAR HYPERTENSION

• Type: Article in International Scientific Journal
• Date: 1990

Authors

Falcão-Reis F (Author) FMUP; ODONOGHUE, E (Author) Other; BUCETI, R (Author) Other; HITCHINGS, RA (Author) Other; ARDEN, GB (Author) Other

Journal

Title: British Journal of Ophthalmology

Vol. 74

Pages: 712-716

ISSN: 0007-1161

Publisher: BMJ PUBLISHING GROUP

Indexing

ISI Web of Knowledge - 28 Citations

Scopus - 29 Citations

Other information

Authenticus ID: P-001-RB0

DOI: 10.1136/bjo.74.12.712

Abstract (EN): Contrast sensitivity has been measured in patients with glaucoma and ocular hypertension, the latter graded into high, medium, and low risk clinical groups. Measurements were made centrally and peripherally a 10°, 15°, 20°, and 25° off-axis at each of the four meridians 45°, 135°, 225°, and 315°. A sine wave grating of 1.9 cycles/degree, reversing at 1 Hz was used. It was displayed on a 100-Hz refresh rate monitor. Normal values were established to compare those from 41 eyes from patients with either primary open angle glaucoma (POAG) with minimal field loss detectable on a Humphrey perimeter, or raised IOP and/or disc changes but no field loss (OH). Those with POAG had normal central contrast sensitivity, but at 20° and 25° eccentricity the values were >2 standard deviations above the normal mean. This was also the case for high risk OH, but not for low risk patients. All the high risk patients except one who had abnormal peripheral contrast sensitivity had possible field defects (threshold elevation at one or more points more than 5 but less than 10 dB above normal mean). Only one of those with normal peripheral contrast sensitivity had such 'suspect points'. The results are assessed in terms of screening of glucoma suspects.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5