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Effect of illumination on walking speed in RPE65-RD subjects and normally-sighted subjects. Shown is a line graph of the mean walking speed, through the maze assessment, at each illumination with errors indicating standard error. This demonstrates a relatively consistent walking speed across light levels in normally-sighted subjects, in comparison to RPE65-RD subjects who walk at a much slower speed at lower light levels with an improvement in walking speed at higher light levels.
