what causes eye crusts
, Veterinarian, writer. The common cause of black crusting around the eyes is low-grade conjunctivitis. This can be precipitated by catflu, allergies, catflu, foreign bodies, dust, etc. Catflu is often low-grade in cats and causes a mild, persistent conjunctivitis with epiphora (tears) and intermittent sneezing. See your vet if problem persists.
Focus On. Find an Ophthalmologist. Crusty eyelids or eyelashes occur when discharge from the eye dries on the lids and lashes. The symptoms and possible related eye conditions/diseases in this section are for general reference only, and do not contain all visual symptoms or all possible related conditions or diseases.