This document discusses various disorders of the eyelids including inflammation of the eyelid glands like styes and chalazions. It describes the symptoms, signs, causes and treatment for external and internal styes as well as chalazions. Abnormalities in eyelash position like trichiasis are also covered. Other conditions discussed include symblepharon, ankyloblepharon, lagophthalmos and ptosis. Various eyelash anomalies and tumors of the eyelids including xanthelasma, basal cell carcinoma, squamous cell carcinoma and malignant melanoma are summarized as well.