bloodshot eyes is dilation of blood vessels
bloodshot, a redness of the conjunctiva or sclera of the eye caused by dilation of blood vessels in the tissues. adjective Red and inflamed; infused with blood, or having turgid blood vessels; especially, inflamed or irritated conjunctivae. redness of the conjunctiva or sclera of the eye caused by dilation of blood vessels in the tissues. adjective Red and inflamed; infused with blood, or having turgid blood vessels; especially, inflamed or irritated conjunctivae.