Polychromatic lusture is seen in :

A i.e. Complicated cataract Complicated cataract (i.e. cataract secondary to some intraocular disease) may be - Anterior coical Q in anterior segmental lesions as glaucoma, acute iritis, or, - Posterior coical Q in posterior segmental lesions as uveitis, RD, pigmentary retinal dystrophy. The second type of complicated cataract presents with posterior coical bread crumb appearance/ polychromatic lusture or rainbow cataract Q Complicated cataract occurs secondary intraocular disease e.g. Inflammatory conditions as uveitis. Degenerative conditions as retinitis pigmentosa, high myopia etc. Intraocular tumors Retinal detachment, Glaucoma etc.