Eyelid DiseasesEyelid Neoplasms: Tumors of cancer of the EYELIDS.Blepharoplasty: Plastic surgery of the eyelid. (Cline et al., Dictionary of Visual Science, 4th ed)Conditioning, Eyelid: Reflex closure of the eyelid occurring as a result of classical conditioning.Adenocarcinoma, Sebaceous: A malignant tumor composed of cells showing differentiation toward sebaceous epithelium. The tumor is solitary, firm, somewhat raised, more or less translucent, and covered with normal or slightly verrucose epidermis. It may be yellow or orange. The face and scalp are the commonest sites. The growth can be slow or rapid but metastasis is uncommon. Surgery cures most of the cases. (From Rook et al., Textbook of Dermatology, 4th ed, pp2403-4)Blepharoptosis: Drooping of the upper lid due to deficient development or paralysis of the levator palpebrae muscle.Ectropion: The turning outward (eversion) of the edge of the eyelid, resulting in the exposure of the palpebral conjunctiva. (Dorland, 27th ed)Blepharitis: Inflammation of the eyelids.Sebaceous Gland NeoplasmsOculomotor Muscles: The muscles that move the eye. Included in this group are the medial rectus, lateral rectus, superior rectus, inferior rectus, inferior oblique, superior oblique, musculus orbitalis, and levator palpebrae superioris.Meibomian Glands: The sebaceous glands situated on the inner surface of the eyelids between the tarsal plates and CONJUNCTIVA.Entropion: The turning inward (inversion) of the edge of the eyelid, with the tarsal cartilage turned inward toward the eyeball. (Dorland, 27th ed)Hidrocystoma: A cystic form of sweat gland adenoma (ADENOMA, SWEAT GLAND). It is produced by the cystic proliferation of apocrine secretory glands. It is not uncommon, occurring in adult life in no particular age group, with males and females equally affected. The commonest site is around the eye, particularly lateral to the outer canthus. It is cured by surgical removal. (Stedman, 25th ed; Rook et al., Textbook of Dermatology, 4th ed, p2410)Blepharospasm: Excessive winking; tonic or clonic spasm of the orbicularis oculi muscle.Eyelashes: The hairs which project from the edges of the EYELIDS.Ophthalmologic Surgical Procedures: Surgery performed on the eye or any of its parts.