Intraoperative Mitomycin C, Amniotic Membrane Transplantation and Conjunctival Autograft for Primary Pterygium

Inclusion Criteria: * Primary pterygium * Willingness to participate in research project and to attend research follow-up * Adults (age 18 to 80 years old) * Patients must not meet any of the following exclusion criteria Exclusion Criteria: * Pregnant,breast-feeding women or patients with poor general health * Patients with significant ocular or lid pathology, such as Sjogren's Syndrome, infection, exposure keratitis, glaucoma, active uveitis, retinal detachment and trauma * Patients with previous surgery on ocular surface, such as trabeculectomy, strabismus surgery * Patients with allergy to intraoperative or postoperative drugs, such as mitomycin C, tobramycin or local anesthetics