The demographic data recorded included age, sex, race, and skin color. History of risk factors, including smoking status, human papilloma virus infection, human immunodeficiency virus infection, chronic use of corticosteroids or other immunosuppressive medications, organ transplant, and corneal graft, was recorded. Any treatment modalities used before referral (excisional biopsy, cryotherapy, and topical chemotherapy) were documented. Recorded clinical findings included best-corrected visual acuity, diagnosis (squamous cell carcinoma or CIN), tissues involved (bulbar conjunctiva, cornea, tarsal conjunctiva, forniceal conjunctiva, caruncle, and semilunar fold), number of tumors, maximal tumor basal diameter (in millimeters), tumor surface area (in millimeters squared), quadrant or location involved (superior, nasal, inferior, and temporal quadrants; upper tarsus; and lower tarsus), number of clock hours of limbal involvement, distance from the limbus, growth type (flat/sessile, dome, and pedunculated), presence of leukoplakia, presence of feeder and intrinsic vessels, presence of internal cysts, and color of the lesion. Based on clinical findings, the AJCC clinical stage of the tumor was determined (Table 1).