<prompt> Commonest type of Retinal detachment?RhegmatogenousChoroidal hemorrhageExudativeTractional  <response>: Ans. a Rhegmatogenous. Ref Ophthalmology by Basak 4th 316; Kanskis 6th349; Parsons 20th311.The term rhegmatogenous is derived from the Greek word rhegma, which means a discontinuity or a break. A rhegmatogenous retinal detachment RRD occurs when a tear in the retina leads to fluid accumulation with a separation of the neurosensory retina from the underlying RPE; this is the most common type of retinal detachment.Types of Retinal detachments TypeDefinitionCauses1.RhegmatogenousFull thickness defect or hole in the retina with subretinal Fluid accumulation Trauma blunt Spontaneous Myopia high ICCE AphakiaPseudophakia Age-related retinoschisis Vitreoretinal tufts and Meridional folds Family history of RD2.Traction detachmentCaused by scar tissue pulling on the retina Proliferative diabetic retinopathy ROP Sickle cell retinopathy sea-fan retina Penetrating posterior segment trauma3.Exudative serous detachmentAs a result of inflammatory diseases or sometimes hypertension Choroidal tumor Exophytic retinoblastoma Vogt-Koyanagi-Harada syndrome Posterior scleritis Infectious syphilis, TB, CMV, Toxoplasmosis Subretinal vascularisation Collagen vascular diseases Coats disease Central serous chorioretinopathy Uveal effusion syndrome Renal diseases Severe hypertension eclampsia preeclampsiaRx of Rhegmatous RD essentially surgical immediateA. Sealing the retinal breaks cryoretinopexydiathermyLaserB. Scleral bucklingC. Subretinal fluid drainageD. ntravitreal injections air or Ringers solutionE. Vitrectomy 