At present my age is 66 years. Due to glaucoma (kala motia) in my left eye. Operation no vision in my left eye. About 6 months back the contract in my right eye. It is humble request that kindly your valuable advise in my following points. 1. Operation is must in Cataract? 2. After cataract operation the contract lenses is essential required or not. 3. In the case of after the operation any problem in right eye (pressure high/low or glaucoma) the contract lenses is remove form eye or not. 4. At present new medicine project available in market? New medicine/product name is advise to me. 5. Pressure of my right eye is 15.0 on 20.04.17 and vision is 6/9. Kindly help me and oblige.