Please Help

I have a 8 month old Lion head bunny, I got him in April. A little while after I got him he lost almost all of his hair by his Right eye, and it started having fluid. We tried many different natural remedies and even called a vet to get there opinion.All the remedies started working but then stopped. He then started sneezing all the time so we took him to the vet. They told us he had a upper respiratory infection and a clogged tear duct. They gave us medicine and told us to come back if it didn't get better. The medicine worked for the upper respiratory infection and started to work on the eye but then stopped. I did not have any money to take him back in and dont think thats what it is. Just yesterday when my bunny and I were outside he hopped into the sun with his bad eye facing it. The eye immediately started leaking white liquid and he closed it all the way and refused to go back in the sun. I was wondering if anyone has dealt with this before or has any suggestions. The pictures are of his eye after I put water on it to get out the clumps. The clumps are white flaky sticky clumps that come off his eye every so often. Thank you for your time.