Before corneal refractive surgery such as<unk> , SMILE, and PRK, people must be examined for possible risk factors such as keratoconus. Abnormal corneal topography compromises of keratoconus, pellucid marginal degeneration, or forme fruste keratoconus with an I-S value of 1.4 or more is the most significant risk factor. Low age, low residual stromal bed (RSB) thickness, low preoperative corneal thickness, and high myopia are other important risk factors.
Post-LASIK ectasia
Apudoma
Chorangioma
Rhinoscleroma
Fundic gland polyposis
Traumatic anserine folliculosis
Fundic gland polyp
Canalicular adenoma