Rosette shaped cataract is seen in:

A i.e. Trauma Blunt trauma (concussion or contusion) to eye 1/t formation of vossius ringQ on anterior surfaceQ of lens and rosette shaped cataractQ usually in the posterior coex. Penetrating trauma (with retention of copper or copper alloy like brass) 1/t golden brown ring (cu deposited in peripheral pas of descemet's membrane layer of cornea) resembling Kayser-Fleischer ring of wilsons diseaseQ and Sunflower cataractQ