What is the definition or description of: blood shot eyes?

Bloodshot eyes: Engorged blood vessels I the clear skin layer( conjunctiva) that overlies the "white of the eye" the sclera. Usually benign, may result from many forms of inflammation..smoke irritation, fatiqued, wind exposure, lack of sleep, allergies, and other irritants. Artificial tears, rest, and avoiding irritants usually resolves. Some chronic cases may require treatment by an ophthalmologist.