Swelling of the cornea, typically due to a lack of oxygen from overwearing lenses or a poor fit.
Infectious keratitis (inflammation of the cornea) is the most dangerous complication and can lead to permanent vision loss. Contact Lens Complications
The most frequent reason for lens discontinuation, causing stinging, burning, or a "gritty" sensation. Swelling of the cornea, typically due to a
The growth of new blood vessels into the normally clear cornea to compensate for chronic oxygen deficiency. Swelling of the cornea