I recently had 3 cats who had that white so bad I thought they were going to be blind forever. However, I put triple antibiotic eye salve in their eyes every 4 hours, get it at the vet, and I gave them amoxicillin every 8 hours, although 12 hours is recommended, but it was scarry. So far 2 out of 3 are perfectly fine now. It's a miracle. The 3rd one is coming along. This takes a week to 3 weeks, so don't give up. If you give up, he WILL be blind forever. So be persistent. You need support? I'm at firstname.lastname@example.org and my phone is available if anyone needs it for emergency help. I have a wealth of knowledge.