<prompt> Anterior uveitis earliest lesion ?Aqueous flareKeratic precipitatesCircumcorneal congestionBlurring of vision  <response>: Ans. is a i.e., Aqueous flare Aqueous flare is the earliest sign of acute anterior uveitis. Keratic precipitates is the pathognomic sign of acute anterior uveitis Clinical features of acute anterior uveitis Acute anterior uveitis is the most common form of uveits, accounting for 60-70 of cases. It is characterized by sudden onset and duration less than 3 months. Presentation is typical with sudden onset of unilateral pain, photophobia, redness, lacrimation and blepherospasm. Vision may be normal initially. However, later there may be distrubance in vision due to ciliary spasm induced myopia, corneal haze due to edema 113s and aqueous turbidity. External examination shows following signs :- Circumcorneal ciliary congestion Which has a violaceous hue. Corneal edema, posterior corneal opacities. Keratic precipitates KPs:- are proteinaceous cellular deposits at the back of cornea on endothelium. Anterior chamber signs :- Aqueous cells, Aqueous flare, hypopyon, hyphaemia in hemorrhagic uveitis, deep anterior chamber If posterior synachiae occurs. Iris signs :- Blurred indistinct iris, i.e. muddy iris, instead of being clear and sharply defined. Papillary signs :- Narrow miotic pupil, irregular pupil due to segmental posterior synechiae which gives festooned appearance festooned pupil when dilated with atropine, sluggish pupillary reaction, ectropion pupillae eveion of pupillary margins, occlusio pupillae due to complete occlusion of pupil by organised exudate. 