Fincham test is used for -
Ans. is 'b' i.e. Differentiate halos due to angle closure glaucoma and immature cataract Fincham'stesto 'Fincham's test is used to differentiate the halos of PACG and immature cataract. In this a stenopaeic slit is passed across the pupil - Glaucomatous halo remains intact, while a halo due to cataract is broken up into segments.