Hello,
Eye problems are normally due to contaminated water, or lack of/too much humidity. Run me through your humidity and how often you change the water, and do you use tap water, rain water or tap water that has been left for 24 hours.
Thanks
-John-
I would call the vet, sometimes you may be able to get an idea over the phone if is it nothing serious. It is important you get it evaluated quickly.
Good luck