Fig. 3. Eccentricity prediction.

(A) Aggregate eccentricity data of subjects (n = 19) shown visual stimuli within 10° of fixation. White asterisk is the foveal confluence; black dotted line is the Hinds et al. V1 border [6]. (B) Algebraic model, fit to the aggregate eccentricity map, after excluding those points with values ≤2.5° and ≥8°. (C) Absolute residual error between the template fit and aggregate data. (D) Median absolute prediction error across vertices and subjects by template eccentricity. The median error (grey), is fit by a fifth-order polynomial (black) with the similarly fit upper and lower quartiles defining the border of the pink region. (E) Contour histogram of all vertices from 10° dataset subjects, binned by measured eccentricity and posterior-anterior position in the template space. The exponential template fit is shown in red. Each contour line corresponds to ~2,000 vertices. (F) Corresponding contour histogram from 20° dataset subjects. The template fit to the 20° dataset is in pink, and the fit to the 10° dataset is reproduced from Fig 2E in red. Each contour line corresponds to ~800 vertices. Inset is the aggregate map for the 20° dataset. Fig. S2B presents the polar angle aggregates and fits by hemisphere, and Table S1 provides the exact formulae measurements.