Posterior Globe Geometry in Vitreoretinal Disease

PurposeTo investigate whether the geometric shape of the globe, sagittal length (SL) and Posterior Radius of curvature (rPC), differ between patients with rhegmatogenous retinal detachment (RD) and macular hole (MH), and to determine if these parameters offer better diagnostic differentiation than axial length (AL) alone. MethodsThis retrospective study included 20 MH and 20 RD patients. Groups were axial-length matched. Ocular biometry was performed with ultrasound to measure AL and SL. The PR was calculated. Due to the non-normal distribution of the data, the Mann-Whitney U test was used for continuous variables and Fishers Exact Test for gender distribution. ResultsThere was no significant difference between the MH and RD groups in terms of age (median: 33.8 vs 32.6 years; p=1.00), gender (p=0.341), or AL (27.65 mm vs 28.58 mm; p=0.39). However, RD eyes showed significantly higher SL (median: 25.70 mm vs 22.90 mm; p=0.001) and a significantly flatter rPC (median: 28.25 mm vs 24.30 mm; p < 0.001). ConclusionRD eyes exhibit a distinct vertical equatorial expansion and posterior flattening that is not present in MH eyes, despite similar axial lengths. These geometric differences suggest that SL and PR are structural risk factors in vitreoretinal disease.