Inward-turning lower eyelid. The eyelashes come into contact with the cornea and irritate it, causing pain, redness and weeping of the eye, and damage to the cornea. The cause is often old age. Muscular tension increases in the lower eyelid, and the muscle fails to relax properly when the eye is opened. The risk is increased if the skin of the eyelids slackens, or in conjunctivitis or blepharitis. Another cause is scar tissue formation in the lower eyelid; the scar tissue shrinks, and drags the eyelid inwards. Treatment is by control of any infection which may be present. The lower eyelid can be pulled back from the eyeball with tape; in chronic cases surgery may be necessary.