Red keratin precipitates are seen in -

Ans. is 'b' i.e., Hemorrhagic uveitisKeratic precipitates (KPs)o KPs are proteinaceous cellular deposits occurring at the back of cornea (corneal endothelial deposits). Keratic precipitates are formed by the aggregation of polymorphonuclear cells, lymphocytes, and epithelioid cells. In the setting of uveitis, the microscopic appearance of KP may yield important diagnostic clues for the identification of the underlying inflammatory disorderMutton fat KP:- Large, yellowish KPs, are characteristic of granulomatous uveitis. These are composed of epithelioid cells and macrophages. They are large, thick fluffy, lardaceous KPs, having a greasy or waxy appearance.Small or medium KPs (granular KPs):- These are composed of lymphocytes and are characteristic of non-granulomatous uveitis. These are small, round and whitish precipitatesRed KPs:- Composed of RBCs and inflammatory cells. These are seen in hemorrhagic uveitis.Old KPs:- In healed uveitis. The above described KPs shrink, fade, become pigmented and irregular in shape with crenate margins.