Corneal edema is swelling resulting from damage to the interior lining of the cornea. This damage can occur from trauma, eye surgery, overuse of contact lenses, toxins, glaucoma or endothelial disorders. Corneal swelling can result in a number of clinical symptoms.
Blurred Vision
Corneal edema sufferers often notice blurring vision, particularly upon awakening, which might fluctuate in severity and frequency.
Rainbow Effect
Some report seeing rainbow-colored halos around lighted objects such as street lamps and headlights. This can make driving at night difficult and dangerous.
Bullae
Because of fluid build-up, blisters called bullae can form on the surface of the eye. These blisters are painful once ruptured.
Decreased Vision
Swelling of the cornea can impair the amount of light that is transmitted through the pupil, resulting in decreased vision.
Redness
Some cases of corneal edema such as those associated with infection or endothelial disorders might present with redness because of inflammation.
