No structure of the eye is completely immune to conjunctivitis, but the cornea is less affected than other parts of the eye. Conjunctivitis is an inflammation of the conjunctiva, the thin layer of tissue that covers the front of the eye and the inside of the eyelid. The conjunctiva does not cover the cornea, but the inflammation can sometimes spread to the cornea and cause a condition called keratoconjunctivitis. In general, however, conjunctivitis tends to affect the conjunctiva, sclera (white part of the eye) and eyelids, rather than the cornea.