Effect of Illumination on Ocular Status Modifications Induced by Short-Term 3D TV Viewing

Abstract

Objectives. This study aimed to compare changes in ocular status after 3D TV viewing under three modes of illumination and thereby identify optimal illumination for 3D TV viewing. Methods. The following measures of ocular status were assessed: the accommodative response, accommodative microfluctuation, accommodative facility, relative accommodation, gradient accommodative convergence/accommodation (AC/A) ratio, phoria, and fusional vergence. The observers watched 3D television for 90 minutes through 3D shutter glasses under three illumination modes: A, complete darkness; B, back illumination (50 lx); and C, front illumination (130 lx). The ocular status of the observers was assessed both before and after the viewing. Results. After 3D TV viewing, the accommodative response and accommodative microfluctuation were significantly changed under illumination Modes A and B. The near positive fusional vergence decreased significantly after the 90-minute 3D viewing session under each illumination mode, and this effect was not significantly different among the three modes. Conclusions. Short-term 3D viewing modified the ocular status of adults. The least amount of such change occurred with front illumination, suggesting that this type of illumination is an appropriate mode for 3D shutter TV viewing.

The Effect of Illumination on Positive Fusional Vergence

“…An additional investigation determined that both the illumination mode and the utilisation of 3D viewing had an impact on ocular health ( Jiang et al 1991 ). This could be attributed to variations in luminance at the viewer’s position, the orientation of the light source, or the familiarity of the participants with their viewing surroundings ( Chen et al 2017 ). They suggested that front illumination is a favourable option for enhancing the visibility of 3D displays.…”