With age and time, the connective tissue of the eyelid can involute or develop some scarring, leading to several lid conditions. Entropion, or an inward turning of the eyelids and lashes, as shown on this slide, can occur as a result of such involution or scarring. Entropion can lead to trichiasis, or rubbing of the eyelashes on the cornea. If trichiasis goes untreated, the corneal epithelium can break down and become infected. Entropion can be treated surgically. Because a lid disorder may damage a patient’s corneas even when fluorescein dye and cobalt blue light show no defects, such patients should be referred if they are symptomatic.