This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Congenital Cataract, Subject name: Ophthalmology
What is to done of congenital cataract involving visual axis? 
Select and explain. 
A. Wait and watch, B. Operated when the baby reaches an appropriate age, C. Mydriatic s are given, D. Immediately operate
D: Immediately operate
Answer: D: Immediately operate 
Explanation: ANSWER: (D) Immediately operateREF: parsons 20th ed p, 257Timing of surgery in congenital cataract:BilateralUnilateralDenseEarly surgery to prevent stimulus deprivation ambylopiaPartialMonitor lens opacities and visual function and intervene if vision deterioratesDenseIf the u/1 cataract is dense and involves the visual axis it should be treated with urgent surgery and aggressive anti ambylopia therapy despite which results are poor , however if detected after 16 weeks surgery is not advised because ambylopia is refractoryPartialNonsurgical treatment with papillary dilation and c/1 occlusion to prevent ambylopia