Often, red eyes are self–diagnosed by people as Conjunctivitis. Infective conjunctivitis is an infection of the thin layer covering the white portion of the eye. It is accompanied by watering and/or yellowish discharge from the eyes.
Occasionally, a viral Conjunctivitis may also involve the cornea of the eye. This is called Keratoconjunctivitis. In this eye infection, vision also may get blurred, and may take few days to weeks to completely clear even after the redness settles.
Any eye infection treatment first requires a complete eye check up.