Fungal keratitis is an infection of the cornea. It can develop quickly from an eye injury or contact lens use. It can cause blindness if it is not treated. Proper use and care of contact lenses can reduce your risk of getting a fungal infection. Treatment of fungal keratitis usually includes antifungal eye drops and oral medications. If these medicines are not effective, you may need surgery, including corneal transplantation. In some cases, even corneal surgery will not restore vision.