Entropion is a turning inward of the eyelid, usually the lower lid. There are four types: involutional, cicatricial, congenital or spastic.

Involutional entropion occurs as a result of aging. Cicatricial entropion results from conjunctival and tarsal scar formation (see diagnostic code: 6017 conjunctivitis, trachomatous, chronic). Congenital entropion is caused by the lid margin being rotated toward the cornea.

Scraping of the cornea by eyelashes (trichiasis) may cause corneal irritation and possible ulceration (see diagnostic code: 6001 keratopathy). Chronic inflammatory scars from trachoma may be apparent. Symptoms may include tearing and eye redness.

The following tests may be used: fluorescein staining; slit lamp; visual fields; visual acuity; and ophthalmoscopy.

The usual treatment is surgery to evert the lid.

Surgery usually results in an effective repair, and impingement of the eyelashes on the cornea is corrected.

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