Pet Questions? Ask a Vet and Get Answers ASAP
The white film you are seeing over the fish's eyes is an indication of a bacterial infection brought on by unfavorable water conditions or the addition of an infected new fish.
The best way to treat this is to begin by changing 25% of the water in the tank.
After the water change add a product called Stress Coat to the water. The Stress Coat contains ingredients which aid in healing affected areas.
Once the above has been done begin to treat the fish with a medicine called Maracyn which is an excellent anti-bacterial medicine. It can be found at most major pet stores.
Just follow the directions on the product label for usage.