Abstract: Conjunctival scrapings for cytological examination and demodicid mite microscopic examination were performed in 55 cases of blephartis patients. Demodicid mites were detected in 40 cases, with a detection rate of 72.7%. The following signs/symptoms displayed among the 40 cases: conjunctival congestion（37）, eyelid hyperemia and hypertrophy（40）, eyelash epilation and abnormal growth（39）, eyelash root with sleeve-like scales（33）, conjunctival lesions（37）, corner lesions(21), meibomian gland orifice occlusion(18), accompanied with skin lesions as acne or acne rosacea（19), hordeolum and chalazion(15). Conjunctival scrapings for cytological examination in the 27 cases revealed medium- and small-sized lymphocyte-predominant inflammatory cells, indicating that the conjunctiva lesion was a result of chronic inflammation.

Key words: Blepharitis, Demodectic mite, Clinical features