<prompt> Most common complication of extracapsular cataract surgery is -Retinal detachmentOpacificatiton of posterior capsuleVitreous haemorrhageNone  <response>: In extracapsular cataract extraction ECCE, major poion of anterior capsule with epithelium, nucleus and coex are removed; leaving behind intact posterior capsule. So, opacificatiton of posterior capsule is the most common complication of extracapsular cataract surgery. Corneal complications and iritisother inflammation are common post-operative complications. 