Anterior Segment Changes After Pars Plana Vitrectomy With SO Using AS-OCT

Inclusion Criteria: * • Patients with rhegmatogenous retinal detachment who are going to undergo vitreoretinal surgery with silicone oil 1000cs injection as tamponade Exclusion Criteria: * Patients with history of intraocular surgery, laser therapy or intravitreal injection. * Patients with significant corneal opacity. * Patients with ocular diseases as retinal vein occlusion, uveitis and proliferative diabetic retinopathy. * Patients with preexisting glaucoma or family history of glaucoma. * Patients with nystagmus. * Patient with tractional retinal detachment, exudative retinal detachment or intraocular foreign body. * Patients with anterior chamber abnormalities including posterior synechia, peripheral anterior synechia, hyphaema and iris abnormalities. * Patients with severe proliferative vitreoretinopathy grade C or more.