<prompt> Superficial corneal vascularization is caused by?Contact lensGraft rejectionChemical burnInterstitial keratitis  <response>: Ans. is a i.e., Contact lens to i.e., Graft rejection Superficial Deep Superficial corneal ulcer Contact lens user Trachoma Rosacea keratitis Phlyctenular keratoconjunctivitis o Cornea graft rejection Interstitial keratitis Disciforrn keratitis Deep corneal ulcer Chemical burns Sclerosing keratitis Viral infection can cause superficial corneal ulcer as well as disciform keratitis. 