This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
Neovascularization of iris is frequently seen in all /except: 
Select and explain. 
A. CRVO, B. Diabetic retinopathy, C. Fuch's heterochromic cyclitis, D. Congenital cataract
D: Congenital cataract
Answer: D: Congenital cataract 
Explanation: D i.e. Congenital cataract Rubiosis Iridis It is neovascularization of iris and may lead to neovascular glaucoma. Neovascularization develops following retinal ischemia, which is a common feature of Proliferative diabetic retinopathyQ CRVOQ Sickel cell retinopathy Eale's disease Other rare causes are Fuch's hetrochromic cyclitisQ, chronic intraocular inflammation, intraocular tumor, long standing retinal detachment & CRAO.