Change of Contrast Sensitivity in Peripheral Vision Following Eccentric Viewing Training

Abstract

This study was to investigate the functional improvement in peripheral vision following eccentric viewing training. Methods: 14 subjects with normal vision took a part with their right eye, peripheral retinal which is 20 o lateral area from the fovea was examined for contrast sensitivity(CS). Eccentric viewing training was performed for 21days with an hour image viewing and examination was repeated. Results: The critical durations for 0.7 cpd were increased 2.67(467 ms) for pre-eccentric viewing training to 2.79(616 ms) for post-eccentric viewing training (p>0.05). The critical durations for 3.0 cpd were also increased 2.53(341 ms) for pre-eccentric viewing training to 3.04(1102 ms) for post-eccentric viewing training (p>0.05). Conclusions: It is recommended to use higher spatial frequency with higher CS for eccentric viewing training and to train more frequently for a short time. Moreover, the study on Korean standardizing of the visual rehabilitation for low vision based on the etiology is sorely required.

A Comparative Study on the Effect of Eccentric Viewing Training Using PC and VR Contents

“…The visual system can be divided into a central vision and a peripheral vision. Reading detailed and accurate information is the central vision's role, and the macula plays a large part in the role [1], [2]. The area within 5 (degree) where the optic nerve is concentrated plays a function of distinguishing face recognition, distance perception, color, and shape [3]- [5].…”

“…The area within 5 (degree) where the optic nerve is concentrated plays a function of distinguishing face recognition, distance perception, color, and shape [3]- [5]. The peripheral vision's role serves to detect a wide background or moving objects [2], [3]. If the function of the central vision is impaired due to macular degeneration, the peripheral vision replaces the function of the central vision [2], [6], [7].…”

“…The peripheral vision's role serves to detect a wide background or moving objects [2], [3]. If the function of the central vision is impaired due to macular degeneration, the peripheral vision replaces the function of the central vision [2], [6], [7]. They are included in low vision, and visual acuity reduction due to macular disorders, central scotoma, and distorted objects [3], [8].…”

“…In the case of visual rehabilitation to preserve residual vision, visual rehabilitation's timing has a decisive effect on prognosis. In addition, studies on the effects of visual rehabilitation have been reported continuously [2], [3], [11]- [14], but since the effects are semi-permanent, constant and continuous training is necessary. In Korea, the basis for rehabilitation for lowvision people is insufficient, so low-vision people are experiencing difficulties in rehabilitation [2].…”

“…In addition, studies on the effects of visual rehabilitation have been reported continuously [2], [3], [11]- [14], but since the effects are semi-permanent, constant and continuous training is necessary. In Korea, the basis for rehabilitation for lowvision people is insufficient, so low-vision people are experiencing difficulties in rehabilitation [2]. Currently, the visual field disorder in Korea is only 1.4% based on the registered persons with disabilities, but macular degeneration is likely to increase with the aging of the eye [13], [15], [16].…”