1. From: Neural bandwidth of veridical perception across the visual field
Journal of Vision. 2016;16(2):1. doi: /16.2.1
Figure Legend:
Methodological details. (A) Retinal test locations (blue rings, 10° steps in eccentricity) with symbols indicating stimulus size (1.5° black circles, 2.5° green circles, or 3.5° red circles). (B) Vector analysis of orientation bias treats acuity as a vector with magnitude = resolution spatial frequency and direction = 2× orientation of test grating. Bias is sum of vectors divided by the sum of vector lengths. (C) Nyquist frequency for an anisotropic array is the geometric mean of the Nyquist frequencies for a pair of orthogonal stimulus orientations. For the illustrated example, the x-direction is also the radial direction of stretching. (D) Convention for specifying retinal location and stimulus orientation for the right eye uses Roman typeface for terms relating to retinal location as seen by an experimenter viewing an observer's fundus. Italic typeface signifies terms relating to stimulus orientation. Meridian is measured counterclockwise from the 0° meridian (horizontal nasal retina). Absolute fringe orientation is measured by the counterclockwise angle of the bars in the fringe relative to the horizontal. Relative fringe orientation is measured from the meridian line instead of the horizontal. Radial (i.e., meridional) fringes are parallel to the meridian line and therefore have 0° relative orientation. Tangential fringes are perpendicular to the meridian line and therefore have 90° relative orientation.
Date of download: 3/1/2018
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