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Recently, 3D technology has been developing. It is generally explained to the public that, “During stereoscopic vision, accommodation and convergence are mismatched and this is the main reason for the visual fatigue caused by 3D”. The aim was to compare fixation distances between accommodation and convergence in young subjects while they viewed 2D and 3D video clips. Measurements were made using an original machine, and 2D and 3D video clips were presented using a liquid crystal shutter system. As results, subjects’ accommodation and convergence were found to change the diopter value periodically when viewing 3D images. These findings suggest that the ocular functions when viewing 3D images are very similar to those during natural viewing. When subjects are young, accommodative power while viewing 3D images is similar to the distance of convergence, and the two values of focusing distance are synchronized with each other.

FOR 3D DISPLAYS, LENS ACCOMMODATION IS VARIABLE AND IT IS CONSISTENT WITH CONVERGENCE