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. Author manuscript; available in PMC: 2015 Jul 1.
Published in final edited form as: Ophthalmology. 2014 Mar 12;121(7):1359–1369. doi: 10.1016/j.ophtha.2014.01.020

Figure 1.

Figure 1

Response probabilities for a sample study subject, at four tested locations (at positions as labeled in degrees). The dashed curve indicates the Frequency-of-Seeing (FOS) curve as fitted using the primary analysis, in which the maximum response probability would be 95% if contrast could be made sufficiently high (assuming a 5% false negative rate). The dotted curve indicates the FOS curve fit allowing this asymptotic maximum to vary, as in the secondary analysis described in the Methods section.