Optican 0.3% Eye Drop is an antifungal medication that treats eye infections. It works by killing the fungi in the eye by destroying their cell membrane. This relieves discomfort, itching, and irritation in the eye. Optican 0.3% Eye Drop is for external use only. Take it in the dose and duration as advised by your doctor. Wash your hands before and after applying the medicine. Hold the dropper close to the eye without touching it. Gently squeeze the dropper and place the medicine inside the lower eyelid. Wipe off extra liquid. This medicine should be used regularly to get the most benefit from it. If you miss a dose, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular schedule. Do not double the dose. Do not use more than you need, it will not clear your condition faster and may only increase the side effects. Do not use it for longer than your doctor has told you to and let him or her know if your condition does not improve after 2 to 4 weeks of treatment. It may cause irritation and burning sensation immediately following application. However, these side effects are temporary and usually subside on their own. Inform your doctor if they persist for a longer duration. Do not wear contact lenses while using it. Do not use the open bottle for more than 4 weeks. It is not likely that other medicines you take by mouth or injection will affect the way this medicine works, but talk to your doctor before using it if you have recently used another medicine that contains a steroid or had an allergic reaction to another antifungal medicine. This medicine should only be used if it is clearly needed if you are pregnant or breastfeeding. Ask your doctor if it is safe.