Dark Adaptation in Diabetics

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Abstract
Dark adaptation in diabetics was recorded with the Goldmann-Weekers'' adaptometer and analyzed according to the stages of retinopathy by Scott. Dark adaptation curves in diabetics were divided into 3 groups: normal dark adaptation; a subnormal one which showed a normal 1st curve of dark adaption and an impaired 2nd curve; and abnormal dark adaptation which showed impaired dark adaptation over the whole course. Few cases with normal dark adaptation were found in retinopathy stages Ia, II and IIIa. Subnormal dark adaptation was realy found in retinopathy stages Ia, II, IIIa and IIIb. Abnormal dark adaptation was recorded in most patients with diabetic retinopathy and found in all the stages of retinopathy. The difference in the thresholds at 35 min after light adaptation in retinopathy stages IIIa and IIIb of retinopathy was statistically significant. The significance of the severity of diabetic retinopathy was discussed.

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