<prompt> Fincham test is used to diagnoseOpen angle glaucomaCataractMucopurulent conjunctivitisAcute angle closure glaucoma  <response>: Ans. b CataractRef: Khurana 4e, p. 146If the halos break it is due to cataract and if not it is due to angle closure glaucoma.Thus, the test is positive in diagnosing cataract. Glaucoma is not being diagnosed by this test. It is a diagnosis by exclusion. 