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

Figure 3

Legend of random-dot-based pattern of the first page of the second-grade test page with 50% contrast for a maximum brightness of 120 lux. (a) Picture viewed by the left eye. (b) Picture viewed by the right eye. (c) Simulation of the perception generated by the test images. The luminance of the dark and light elements was 40 lux (grayscale no. 43, RGB [110, 110, 110]) and 120 lux (grayscale no. 71, RGB [181, 181, 181]), respectively. The setting disparity of the mouth of the Pacman was 90″ (facing right), 80″ (facing up), 70″ (facing down), 60″ (facing right), 50″ (facing left), 40″ (facing up), 30″ (facing down), and 20″ (facing down). If the stereopsis of a subject is better than the setting disparity, the mouth of the Pacman should be distinguished when fusing correctly.

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