<prompt> All are false regarding ophthalmic use of topical retinoic acid except :Conjunctival melanomaNaeus or congenital molesOcular-surface squamous neoplasmPterygium  <response>: Ocular surface epithelium Squamous neoplasia OSNN Most common malignancy of the conjunctiva. OSSN lesions typically present as fleshy conjunctival lesions with a gelatinous, leukoplakic, or papillary appearance. Arise from the limbal stem cells. Produces symptoms as of dry eye.It can be reversed by the application of topical trans-retinoic acid ointment Retinoic acid also promotes epithelial healing. Pterygium- Topical Mitomycin C antiproliferative have been used daily after pterygium surgery to reduce scarring and recurrences. Conjunctival melanoma-Once suspected, enucleation or exenteration is the treatment of choice, depending upon the extent of growth. Naevus or congenital moles- Excision indicated for cosmetic reasons 