INNER MACULAR CHANGES AFTER VITRECTOMY WITH INTERNAL LIMITING MEMBRANE PEELING FOR RHEGMATOGENOUS RETINAL DETACHMENT: Similarity With Alport Syndrome.

PURPOSE The internal limiting membrane (ILM), the innermost basement membrane of the retina, is peeled occasionally during vitreous surgery. This study aimed to investigate the effect of ILM loss on the retina. METHODS We used optical coherence tomography to retrospectively evaluate retinal changes in 26 eyes (11 ILM-peeled and 15 ILM-unpeeled eyes) of 26 patients after vitrectomy for retinal detachment. In addition, we studied six eyes of three patients with Alport syndrome, in which ILM is genetically impaired. RESULTS We observed significant inner retinal displacement of the foveal pit toward the optic disk with inner retinal thickening in the nasal area (fellow, 191.9 ± 24.3 μm vs. affected, 210.3 ± 31.4 μm; P = 0.048), inner retinal thinning in the temporal area (fellow, 174.3 ± 18.3 μm vs. affected, 142.2 ± 23.6 μm; P < 0.001), foveal thickening (ILM-unpeeled, 217.0 ± 39.4 μm vs. ILM-peeled, 302.0 ± 86.2 μm; P = 0.006), inner retinal dimples predominantly in the temporal area, and deviation between the foveal pit and foveal bulge. Eyes with Alport syndrome exhibited similar findings. CONCLUSION Internal limiting membrane loss seems to cause characteristic inner retinal changes of the macula in both congenital and acquired conditions.

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