Duration of Silicone Oil Tamponade on Foveal and Parafoveal Thickness in Rhegmatogenous Retinal Detachment

Inclusion Criteria: * • Silicone oil (SO) tamponade ( up to 6 months) * Attached retina under SO * Attached retina 3 months after Silicone oil Removal (SOR) * Normal fellow eye ( no retinal detachment or macular disease) * OCT scan performed for the operated eyes (before SOR, and 3 months after SOR), and for the fellow eye (at any time during the study) Exclusion Criteria: * • Rhegmatogenous Retinal Detachment (RRD) with other tamponades ( e.g.: Gas, Densiron) * SO tamponade less than 3 months, or more than 6 months * Recurrent RD under SO * Recurrent RD within 3 months after SOR * One eyed * Vitrectomized fellow eye * Retinal detachment, or macular disease in the fellow eye. * Posterior staphyloma * Anisometropia (history, refraction if possible, spectacles prescription) * Absence of any of the OCT scans performed for the operated eyes (before SOR, and 3 months after SOR), and for the fellow eye (at any time during the study)