Effect of Luminance and Contrast Variation on Stereoacuity Measurements Using Smartphone Technology

Figure 5

Trend curves characterized by the relationship between stereoacuity and Michelson contrast for different test symbols. Groups 1, 2, 3, and 4 represent the maximum brightness values at 240, 120, 60, and 30 lux, respectively. The circles and bars represent the median and quartile of the stereopsis, respectively.