Correlation Between Stereopsis and Reverse Stereopsis in Homonymous and Bitemporal Hemianopias

Stereopsis, a binocular phenomenon dependent on higher order visual processing, can reliably suggest a range of visual acuity (VA) in patients with no history of strabismus. Michael Brodsky, M.D. suggested that patients with bitemporal hemianopias may demonstrate absence of stereopsis on reverse stereovision testing. Prior to testing Dr. Brodsky's hypothesis, we showed that there was no difference between traditional stereoacuity (stereoacuity book upright, 'TS') and reverse stereoacuity (stereoacuity book rotated 180 degrees, 'RS') in patients without visual field defects. Here we report the results of TS and RS testing in patients with homonymous hemianopias (HH) and bitemporal hemianopias (BTH).