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SD OCT Features of Macula and Silicon Oil–Retinal Interface in Eyes Status Post Vitrectomy for RRD

Author(s): Manish Nagpal, Navneet Mehrotra, Rituraj Videkar, and Rajen Mehta

Aim: To objectively document findings at the Silicon oil-Retinal interface, macular status and tamponade effect in Silicon Oil (SO) filled eyes using SD OCT. Methods: 104 eyes of 104 patients underwent SD OCT examination, horizontal and vertical macular scans, in silicone oil filled eyes which underwent silicone oil injection post vitrectomy for rhegmatogenous retinal detachment. Findings were divided into 3 Groups; Group A: Findings at silicon oil retinal interface, Group B: Macular pathology and Group C: Tamponade effect. Group C was further divided into two groups; Group 1: Complete tamponade and Group 2 : Incomplete tamponade. Results: Group A: subsilicon epiretinal membranes 𝑁 = 17 (16.3%), emulsified silicon oil 𝑁 = 16 (15.4%) Group B: foveal thickening 𝑁 = 22 (21.2%), foveal thinning 𝑁 = 6 (5.7%), subfoveal fluid 𝑁 = 8 (7.6%), macular hole 𝑁 = 2 (1.9%); Group C: Incomplete tamponade was noted in 𝑁 = 12 (11.5%), complete tamponade 𝑁 = 92 (88.5%).10 out of 104 eyes (9.6%) had recurrent retinal detachment post silicon oil removal. 8 of these eyes had complete tamponade and 2 had incomplete tamponade. Conclusion: SD OCT is a useful tool to assess the SO–Retina interface, tamponade effect and macular pathology in SO filled eyes. There is lesser incidence of redetachment with incomplete tamponade in OCT.

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