Conjunctivitis is inflammation of the thin membrane covering the white part of the eyes (sclera) and the inner surface of the eyelids called conjunctiva.
Pterygium is a condition where a growth develops on the conjunctiva of the eye, typically as a result of exposure to external factors such as wind, dust, and sunlight.
Viral conjunctivitis is inflammation of the eyes caused by a viral infection. This type of conjunctivitis is often contagious and can spread through contact from person to person.