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Dacryocystitis is an infection of the lacrimal sac, secondary to obstruction of the nasolacrimal duct at the junction of the lacrimal sac. [1] The term derives from Greek dákryon 'tear' cysta 'sac' and -itis 'inflammation'. [2] It causes pain, redness, and swelling over the inner aspect of the lower eyelid and epiphora.
Infections like syphilis by causing a moth-eaten appearance of the eyebrow hair loss. Viral infections like herpes or HIV can cause scarring of the eyelid, causing loss of hair. Various fungal infections like paracoccidioidomycosis can cause lesions and changes in the hair locations of the eyelid.
Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. [2] The infection causes a roughening of the inner surface of the eyelids. [2] This roughening can lead to pain in the eyes, breakdown of the outer surface or cornea of the eyes, and eventual blindness. [2]
Bacterial infections, allergies, other irritants, and dryness are also common causes. Both bacterial and viral infections are contagious, passing from person to person or spread through contaminated objects or water. Contact with contaminated fingers is a common cause of conjunctivitis.
The upper or lower eyelid can be involved, and one or both eyes may be affected. When entropion occurs in both eyes, this is known as "bilateral entropion". Repeated cases of trachoma infection may cause scarring of the inner eyelid, which may cause entropion. [3] In human cases, this condition is most common to people over 60 years of age. [4]
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Stye of the upper eyelid 8-year-old boy with an external hordeolum of lower lid. The first sign of a stye is a small, yellowish spot at the center of the bump that develops as pus and expands in the area. [7] Other stye symptoms may include: A lump on the top or bottom eyelid; Localized swelling of the eyelid; Localized pain; Redness; Tenderness
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