Commercial laboratory, hospital, doctor's office. Technician, nurse, doctor, optician, optometrist. No changes necessary. No changes necessary. No changes necessary.
Discomfort disappears when the test is finished.
Equipment used Color plates are dot patterns of primary colors superimposed on backgrounds of randomly mixed colors. Disposable tissues or disposable eyepatches. Description of test Sit upright. Cover one eye at a time. Identify and trace the symbols on the test plates.