Which feature is most characteristic of anterior uveitis (iritis)?

Which feature is most characteristic of anterior uveitis (iritis)?

• A. Ciliary injection (limbic flush)
• B. Purulent discharge
• C. Vision changes
• D. Painful red eye

Answer: (A)

The most characteristic feature of anterior uveitis is a limbic (ciliary) flush—redness that encircles the cornea due to inflammation of the iris and nearby ciliary body. This deeper, circumlimbal injection contrasts with the superficial conjunctival redness seen in conjunctivitis and is a key clue on exam when the iris and pupil are involved. Patients often have pain and photophobia, but the distinctive redness pattern around the limbus best points to anterior uveitis. Purulent discharge is more typical of conjunctivitis; vision changes can occur but are not the defining sign.

The most characteristic feature of anterior uveitis is a limbic (ciliary) flush—redness that encircles the cornea due to inflammation of the iris and nearby ciliary body. This deeper, circumlimbal injection contrasts with the superficial conjunctival redness seen in conjunctivitis and is a key clue on exam when the iris and pupil are involved. Patients often have pain and photophobia, but the distinctive redness pattern around the limbus best points to anterior uveitis. Purulent discharge is more typical of conjunctivitis; vision changes can occur but are not the defining sign.