[Image analysis of optic disk swelling in diabetic retinopathy]

Optic disc swelling was measured by computerized image analysis in diabetic patients. The subjects were divided into four groups. Group 1 contained 13 eyes without diabetic retinopathy, group 2, 14 eyes with a mild stage of simple diabetic retinopathy, group 3, 14 eyes with a severe stage of simple diabetic retinopathy and group 4, 14 eyes with preproliferative diabetic retinopathy. There were statistically significant differences in the optic disc swelling between group 1 and group 4, and between group 2 and group 4 (p < 0.05). The optic disc swelling increased as the stage of diabetic retinopathy progressed.