Medically reviewed by Christine L. Larsen, MD Eye crust forms when mucus, oils, and debris accumulate, often during sleep.

A stye is an abscess which occurs in the eyelid. It usually arises in the base of the hair follicle of an eyelash. Although not serious or dangerous in themselves recurrent styes interfere with ...

A tiger who spent the majority of his life as an attraction at an animal park in Spain has gone blind, due to the incessant camera flashes of tourists coming to gawk at him – resulting in the need for ...