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. Author manuscript; available in PMC: 2016 May 11.
Published in final edited form as: Optom Vis Sci. 2016 May;93(5):521–533. doi: 10.1097/OPX.0000000000000820

FIGURE 1.

FIGURE 1

(A) Permanent peripheral prism glasses in the horizontal design constructed with embedded rigid PMMA Fresnel prism inserts of 36Δ above and below the pupil base-left on the left lens only for a patient with left hemianopia. (B) Binocular visual field of a patient with left hemianopia. (C) Binocular visual field of the same patient wearing horizontal peripheral prisms resulting in a field expansion of about 20 degrees. The outer dashed line represents the normal binocular visual field and the dotted rectangle represents the field of view through the windshield of a typical car.2