Central Toxic Keratopathy after Photorefractive Keratectomy: A Four-Year Case Report.
Introduction: Central toxic keratopathy (CTK) is an uncommon, non-inflammatory opacification of the central cornea after excimer laser refractive surgery, usually within the first postoperative week. The cornea loses central stromal tissue and flattens, and the eye becomes hyperopic. Why it happens is not known; both s...