<prompt> Neovascularization of iris is frequently seen in allexceptCRVODiabetic retinopathyFuchs heterochromic cyclitisCongenital cataract  <response>: Causes of rubeosis iridis neovascularization of irisCommon :Diabetic retinopathy most common cause, central retinal vein occlusion, Eales disease, siclde-cell retinopathy.Rare causes :Long standing retinal detachment, central retinal artery occlusion, intraocular inflammation uveitis, intraocular tumors choroidal melanoma, retinoblastoma, radiation retinopathy, ocular ischemic syndrome carotid artery disease, carotid-cavernous fistula. 