The near reflex evaluation in diabetic patients without retinopathy

Purpose. - To evaluate accommodative amplitude (AA) and fusional vergence amplitudes (FVA) in type 2 diabetes mellitus (DM) patients without diabetic retinopathy (DR). Materials and methods. - This study of 30 type 2 diabetic patients aged 35-50 years and 31 healthy subjects analyzed FVA, objective AA measurement and statistical evaluation. The study also evaluated the effects of mean HbA1c, age, and DM duration on AA. Results. - The groups were similar in age (P = 0.535). There were statistically significant differences between the groups in terms of mean convergence amplitude at distance (P = 0.003), divergence amplitude (P = 0.002) and mean convergence amplitude at near (P = 0.001). Mean divergence amplitude at near (P = 0.063) and near convergence point measurements (P = 0.586) were not statistically different. AA was 0.52 +/- 0.3 D in the DM group and 0.88 +/- 0.4 D in the control group (P < 0.001). Age was negatively correlated with AA in both groups (r1 =-0.492, P1 = 0.003 and r(2)=-0.844, P2 < 0.001). Multivariate regression analysis showed that age influenced AA in patients with an R-2 value of 0.179 (P = 0.044). Conclusion. - Compared to healthy controls, type 2 DM patients without DR had lower accommodative and convergence amplitudes, suggesting that type 2 DM patients may develop presbyopia at an earlier age. (c) 2025 Elsevier Masson SAS. All rights are reserved, including those for text and data mining, AI training, and similar technologies.