The applied kinesiology response has been used by chiropractors since the mid 20th Century for diagnostic purposes. The muscle response measure was achieved through gross physical movements of voluntary muscle groups. True Eyes Glasses eliminate a subjective component of muscle testing which relies on striated/voluntary muscles and provide an alternate means of assessing the applied kinesiology response with an involuntary (non-volitional) objective measure derived through a unique device measuring iris movement (constriction or dilation of the pupil).