The Topography of The Optic Disc in Diabetic Patients

Abstract

Aim: To evaluate the optic disc area by using Heidelberg Retinal Tomograph (HRT) in patients with diabetes mellitus (DM) and to compare it with age and sex matched healthy controls.

Material-method: Fifty-eight diabetic patients and  98 healthy control subjects were enrolled in the study. Diabetic patients were divided into 2 groups: no diabetic retinopathy (NDR) and non proliferative DR (NPDR). Measurement of optic disc area was performed by HRT III. Anova and Kruskall Wallis tests were used for statictical analysis and the degree of association between variables was calculated by Spearman’s rho correlation coefficient.

Results: There were 28 eyes in the NDR group and 30 eyes in the NPDR group. Demographic characteristics of patients  and control subjects were similar (p>0.05). Disease duration was similar in two groups. Mean disc area was 1.93±0.35 mm in eyes with NDR and 2.08±0.49 mm in eyes with NPDR. Disc area of eyes with NPDR was not different from those with NDR (p=0.13).

Conclusion: This study demonstrated that topographic features of the ONH did not differ between the diabetic patients and the control group. There may not be an interaction between DM and ONH topography.