<p>Supplementary Data</p><p>Figure S1. BCEA vs PRL Eccentricity</p><p>Scatter plot of the 68% (1SD) bivariate contour ellipse area (BCEA, median of 3 fixation tests), determined during fixation on the central letter of a 3-letter word within the MP-1, as a function of the radial eccentricity of the PRL from the residual foveal location. PRL eccentricity was measured as the Pythagorean distance from the estimated location of the residual fovea, determined using the standard values from 104 normally-sighted subjects reported by Rohrschnieder et al. 25 Across all subjects, the correlation between BCEA and PRL was low (r = +0.232). Removal of the outlier with the largest BCEA did not improve the relationship (r = +0.141) Figure S2. %MSs vs Median Sensitivity</p><p>Scatter plot of the percentage of Micro-scotomas (%MSs), determined during supra-threshold sensitivity screening (STSS) around the fixation PRL, as a function of the median sensitivity (of 4-6 test locations around the PRL) from 10-2 testing. Across all subjects, there was a significant moderate correlation (Pearson r= -0.605, p =0.00051; Spearman r = -0.585, p = 0.00086) between the 2 measures. Expected Expected Expected Expected Actual Actual x- Actual Actual MAR x-height Pixels Pixels height MAR Snellen arc min MP-1 MP-1 MP-1 Snellen denominator denominator 80 4 20 3.49 3 17.18 3.44 68.7</p><p>100 5 25 4.37 4 22.90 4.58 91.6</p><p>125 6.25 31.25 5.46 5 28.63 5.73 114.5</p><p>160 8 40 6.99 7 40.08 8.02 160.3</p><p>200 10 50 8.73 9 51.53 10.31 206.1</p><p>250 12.5 62.5 10.92 11 62.98 12.60 251.9</p><p>320 16 80 13.97 14 80.15 16.03 320.6</p><p>400 20 100 17.47 17 97.33 19.47 389.3</p><p>Supplementary Table. Actual Snellen sizes of the 3-letter words displayed in the MP-1</p><p>MAR is calculated as the Snellen denominator divided by 20 and x-height is 5 times the MAR. The displayed acuities were not significantly different (t (7) = -1.13, 2-tailed p 0.147) from the expected acuities.</p>