Figure 2
From: Visual contrast sensitivity in patients with impairment of functional independence after stroke
Contrast sensitivity to sine-wave gratings. Contrast Sensitivity Curves for Spatial Frequencies of Patients with Functional Independence, according to the Barthel Index, from 20–35 (2A), 40–55 (2B), 60–95 (2C) and 100 points (2D). The letter “n” represents the number of curves measured for each sub-group. The vertical lines show the standard error of the mean for each frequency (0.6, 2.5 and 10.0 cpd).