[A study of spectral electroretinograms of color vision defects due to macular diseases].
Studies of spectral electroretinograms in central serous chorioretinopathy (CSC) and hereditary macular degeneration (HMD) found that the b-wave amplitudes of CSC for most wavelengths were significantly decreased as compared with normal controls, and the b-wave amplitudes of HMD for most wavelengths were obviously lower than the normal values. Patients of HMD with type-A color vision defects (CVD) showed primarily a reduction of b-wave amplitudes for the full spectrum of 480-620 nm, and patients with type-I CVD a reduction of b-wave amplitudes for wavelengths of 480-560 nm. These differences might reflect differences in damages to the medium-and long-wave length cones.
Tian
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Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou.
D000293:Adolescent; D000328:Adult; D002825:Chorioretinitis / Q000150:complications*; D003118:Color Perception; D003117:Color Vision Defects / Q000209:etiology / Q000503:physiopathology*; D004596:Electroretinography; D006801:Humans; D008268:Macular Degeneration / Q000150:complications*; D008297:Male