Who fails lantern tests

摘要: A battery of clinical colour vision tests was given to a group 100 observers with abnormal who were also tested on the Farnsworth lantern and Holmes-Wright lanterns types B. It found that are imperfect predictors test performance. However, classified as having ‘severe’ defect fail but only one half two-thirds those can be identified in this way. is not possible identify certainty any people likely pass tests: about one-third being mildly affected tests. The D-15 City University best performance other such Nagel anomaloscope, H-16, L'Anthony's desaturated used. lack strong correlation between recognition small coloured stimuli presented by suggests do same aspect important signal lights. For reason should retained for occupational testing vision.