Sorry for the delay in getting back to you. The retina specialist I went to was worried that if my optic nerve began to be damaged that I would think it was the cataract getting worse. He did’nt think it was worth the risk. He forwarded his concern to NJC and their reply was that the ethambutal was not causing the cataract to grow faster but they appreciated his concern in not being able to discern the difference in why my vision changes would not seem unusual to me. I will go back to NJC in November. Hopefully that will give me some other medicine. Thanks for responding.