In the fields of optometry and ophthalmology, the<unk>  is a binocular, dissociative, subjective cover test that measures strabismus in the nine diagnostic positions of gaze. The test is named after Walter Brackett<unk> , who introduced it in 1939. __TOC__
Lancaster red-green test
Buehler test
Weber test
Vinegar test
Elek's test
Kveim test
Cozen's test
Heidelberg test