it is the infection of conjunctive, usually caused by bacteria or something virus. The symptoms are redness, discharge & irritations of the eye.
It is an infection of the root of the eye lashes. Symptoms are a painful swelling at the lid margin & occasionally pus discharge from the root of eye lash.
Treatment is hot compresses painkillers & sometimes epilation of the involved eye lash.
Sometimes the conjunctive grow onto the Cornea. This is call pteygium.
It is usually seen as a triangular fold of conjunctive.