Anterior uveitis earliest lesion ?
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 & 1(13s) 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).
Aqueous flare
Keratic precipitates
Circumcorneal congestion
Blurring of vision