Objective concurrent measures of open-loop accommodation and vergence under photopic conditions.

摘要: PURPOSE To investigate the relationship between photopic open-loop accommodation and vergence effect of mental effort on these positions. METHODS Twenty subjects (11 men 9 women) viewed monocularly a (25 cdm-2), high-contrast (90%) Maltese cross-target for 3 minutes, through 0.5-mm pinhole drilled into an infrared filter. Accommodation was measured objectively at 1-second intervals using Canon Autoref R-1 optometer, recorded continuously differential eye tracking system. RESULTS Under passive viewing conditions there significant correlation (R = 0.671, P 0.0012); majority imposition shifted levels both vergence, but shifts were unsystematic uncorrelated 0.259, 0.270). The active positions also found to be correlated 0.692, 0.0007). CONCLUSIONS influence proximal stimuli can explain correlations identified vergence. responses systems are likely reflect interactions various spatiotopic including perceived proximity.