<prompt> Conjunctival mucosal overgrowth over cornea -PterygiumPingeculaVernal keratoconjuncivitisHerbes pit  <response>: Pterygium is a non-cancerous non-neoplasic growth of conjunctiva, characterized by a wing-shaped fold of conjunctiva encroaching upon the cornea form either side within the interpalpebral fissure. Reference: AK khurana 7th edition page 89 