Fig. 4: Oculomotor contributions to acuity. | Nature Communications

Fig. 4: Oculomotor contributions to acuity.

From: Finely tuned eye movements enhance visual acuity

Fig. 4

a Retinal stabilization. Stimuli moved on the display under real-time computer control (red arrow) to counteract the motion of the stimulus on the retina caused by eye movements (blue arrow). b Performance as a function of optotype size under retinal stabilization. The red line is the average psychometric function of N = 7 observers. Contrast was individually adjusted to yield  ~5% correct identification during normal unstabilized viewing of 0 logMAR optotypes (black circle). Retinal stabilization greatly impaired performance (red arrow). Increasing the optotype size reestablished threshold level (blue arrow). The shaded region represents SEM (*p = 0.003, two-tailed paired t-test; **p = 0.002, two-tailed paired t-test). c Performance by optotype position in the 20/20 line. Filled circles represent averages across subjects for optotypes at different eccentricities on the display. Performance under retinal stabilization was significantly lower at all positions (p < 0.03; one-tailed paired t-test). Squares and triangles represent individual data under normal and stabilized viewing, respectively. Error bars represent SEM. d Acuity loss in the central 0–15′ and in the \(1{5}^{\prime}\)\(3{0}^{\prime}\) range of foveal eccentricity. Black circles and error bar represent medians and SEM across subjects (*p = 0.0008, two-tailed paired t-test). Triangles are individual subject data. Source data are provided as a source data file.

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