Figure 5.

(A) Calculated and (B) measured binocular field diagrams of a patient with left homonymous hemianopia with two configurations of bilateral yoked full-field prisms. Left and right columns show the effects of full-field prisms in the meniscus and flat outward prism serration (OPS), respectively. Results for 7Δ and 12Δ are in the top and bottom row, respectively. The dashed line shows the binocular visual field without prisms. Due to the fixation shift, there is no field-of-view shift into the blind side (left). The compensatory head rotation toward the seeing (right) side for the fixation shift is expected to result in far right temporal field expansion on the seeing side, which is verified by the measurements. The calculated apical scotomas shown are from the right prism, and the upper parts of these may be compensated for by the nasal field of the left eye as seen in the measurements. The apical scotomas in the mid-periphery are wider than the magnitude of the temporal field shift. Note that the patient had incomplete hemianopia, which was consistent with his prior perimetry records.