in vivo method optokinetic reflex test method 2021-06-18T18:31:15Z MMO:0000754 OKR test method PMID:28441076 This testing method may involve an optokinetic drum, a strip of paper with alternating 2-inch black/colored and white strips, or a mirror used to rotate across the subject's visual field. Any of the options may be passed in front of the subject's eye(s). The subject looks at the object as it rapidly moves by. The time between cycles of the eye(s) repositioning to the original position is recorded. alternating stripe method measurement_method_ontology optokinetic drum method slaulede