Please post water perameters ammonia, nitrite, nitrate, Ph, hardness if available and temperature. These numbers are need to recommend the correct medacation. Most eye infections are gram positive so a good first step is gravel vacuming and a 50% water change. Ideally the water change should be done after you test the water but if you can't test do the water change and dose the tank with salt at 1 table spoon per 5 gallons. Use Methylene Blue in a bath dosed at 1 teaspoon per 5 gallons of tank water (exact dosing isn't critacal so just get close) with 1 tablespoon of salt per 5 gallons. Bath the fish for 30 mins and then return to the main tank, a 5 gallon bucket is perfect for this. That will help, then based on water test results I can give further treatment options.
