This happens when part of the cornea bulges, as a result of the cornea thinning with no known cause, leading to keratoconus of different types. With this disorder, patients experience blurred or warped vision, sensitivity to light, or frequent changes in eyeglass prescriptions. The symptoms generally become more severe and reach the worst within about 10–20 years.
This is an inflammation of the cornea, which usually stems from a bacterial or viral infection or injury to the cornea. Symptoms include eye redness, eye pain, excess tears, discharge, blurred vision, and sensitivity to light. This often occurs in those wearing contact lenses regularly. The disease progression rate depends on infection severity. Complications include corneal perforation, vitreous inflammation, secondary glaucoma, and secondary cataract.
Often caused by genetics, it negatively impacts the function of the cornea, causing blurry vision.
This is often related to corneal abrasion and infection. A small and shallow ulcer may heal within a few days. If the ulcer is very deep, scar tissue may form, causing opacity and little light passing through, resulting in impaired vision.
- Corneal edema (Swelling of the cornea)
This happens when the fewer endothelial cells of the innermost layer of the cornea do not function properly causing a fluid build-up, losing clarity and focusing power. Corneal edema may be caused by an autosomal dominant inherited corneal dystrophy, glaucoma, herpes infection or shingles, or an injury.
- Cornea transplant rejection
This happens when your immune system recognizes the donated cornea as not belonging to you and attacks it, causing such symptoms as decreased vision, redness, discomfort, watering, and sensitivity to light.