Blepharitis is the most common ocular finding in psoriasis. Erythema, edema, and psoriatic plaques may develop, and they can result in madarosis, cicatricial ectropion, trichiasis, and even loss of the lid tissue.
A chronic nonspecific conjunctivitis is fairly common. It usually occurs in association with eyelid margin involvement. Psoriatic plaques can extend from the lid onto the conjunctiva. Chronic conjunctivitis can lead to symblepharon, keratoconjunctivitis sicca, and trichiasis. Nodular episcleritis and limbal lesions resembling phlyctenules also can be seen.
Corneal disease is relatively rare. Most often, it is secondary to lid or conjunctival complications, such as dryness, trichiasis, or exposure. The most common finding is punctate keratitis. Filaments, epithelial thickening, recurrent erosions, vascularization, ulceration, and scarring can occur. The vascularization tends to be superficial, peripheral, and interpalpebral or inferior. Rarely, peripheral infiltration and melting can occur in the absence of trichiasis and exposure.
For more on ocular manifestations of psoriasis, read here.
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Any views expressed above are the author's own and do not necessarily reflect the views of WebMD or Medscape.
Cite this: Dirk M Elston, William James. Fast Five Quiz: What Do You Know About Psoriasis? - Medscape - Jun 13, 2019.
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