We have shown previously that individuals with dense central scotomas due to macular degeneration have better eye-hand coordination when they have
coarse stereopsis. Here we investigate the hypothesis that this degree of stereopsis is determined by the scale of receptive fields at the eccentricity with
intact binocular function, i.e., at the eccentricity with input from corresponding locations in the two eyes. To test this hypothesis, we measured binocular
fusion and stereopsis in the periphery as a function of eccentricity in normal controls and show that these are indeed consistent with estimates of human
population receptive fields in putative disparity encoding regions of the cortex.