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Abstract
Abstract
Are There Any Differences in Colour Vision between Patients with Coronary Heart Disease (CHD) and Patients with Primary Open-angle Glaucoma and CHD?
Erb C., Schröder A., Meyer M.
Medical High School, Dept. of Ophthalmology, Hannover
Purpose: To differentiate colour vision defects in patients with primary open-angle glaucoma (POAG) and coronary heart disease (CHD) from that of patients with CHD without glaucoma.
Method: The morphological status, visual acuity, intraocular pressure, and the cup/disc-ratio were examined in all groups. In addition, white-on-white perimetry was applied in the glaucoma patients. Colour vision, examined by the hue arrangement test, Roth 28-hue (E) desaturated, was measured monoculary under standard conditions in both eyes. The background was a black cardboard; illumination was provided by fluorescent light sources with a balanced spectral distribution and a colour-rendering index of 93 (Osram L36W/12 LDL Daylight).
Results: Twenty patients (m:f=10:10; mean age 68+8 years) with POAG and an CHD (group 1), 28 patients with an angiographically documented CHD (m:f=33:1; mean age 67±7 years) Group 2) and 38 normal controls (m:f=23:15; mean age 66±5 years) (group 3) were examined. Visual acuity was similar in all three groups. However, the POAG-patients had an higher intraocular pressure, a larger cup/disc-ratio and scotomas in the visual field. Testing of colour vision revealed a significantly higher error score in group 1 and 2 than the control group (median±mean absolute deviation=114±53; p<0.001). No differences were found between grou