Prospective Randomized Pilot Study Comparing Inferior Versus Superior Conjunctival Autografts for Primary Pterygia

Inclusion Criteria: * Primary pterygium (no previous surgeries or radiotherapy) requiring excision due to ocular discomfort or disruption in vision * Ability to understand the nature of the procedure and to complete all measurement requirements * Patients must be eligible for either the superior or inferior conjunctival autografts (they must not meet any of the following exclusion criteria) * Adults (age \>18) Exclusion Criteria: * Ocular surface disease apart from pterygium (such as severe dry eye, corneal disease, scarring from previous infection, radiotherapy, inflammatory diseases or trauma) * Patients who have had previous ocular surface surgery * Patients with glaucoma or those who may need glaucoma surgery in the future * Contraindications to local anesthetics (such as known allergy) * Pregnancy (as the risk to the fetus with the use of topical antibiotic drops and local anesthetics are not known)