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. Author manuscript; available in PMC: 2009 Feb 1.
Published in final edited form as: Vision Res. 2008 Jan 14;48(4):577–588. doi: 10.1016/j.visres.2007.11.022

Figure 2.

Figure 2

Illustration of the method for estimating monocular scotoma position (measured for the higher-acuity eye) within a visual-span profile (measured under binocular viewing). A large scotoma extending from 3.5° to 10.5° horizontally from the AMD subject’s point of fixation (PRL) is superimposed on the subject’s visual-span profile. The scotoma overlaps letter positions from +2 to +5 in the visual-span profile for characters with x-height of 1.66°. Gray bars in Figure 3 illustrate the positions of scotomas computed in this way.