|
KMID : 1011420130180040489
|
|
Journal of Korean Ophthalmic Optics Society
2013 Volume.18 No. 4 p.489 ~ p.493
|
|
|
Study on Physiological Summation in Peripheral Retina for Eccentric Viewing Training
|
|
Seo Jae-Myoung
Lee Ki-Young
|
|
|
Abstract
|
|
|
Purpose:This study was to investigate peripheral vision and provide people with macular degeneration with a
guideline for eccentric viewing training.
Methods:30 adult subjects with normal vision took part in this study.
The lateral area of 20o eccentricity from the fovea of right eye was only used to measure the physiological
summation. The target was sinusoidal vertical gratings within a circular aperture. The critical points in spatial and
temporal summation was found to compare each other for 0.7 cpd and 3.0 cpd, respectively.
Results:Critical duration and contrast sensitivity for 0.7 cpd were 540 ms and 1.1, and 315 ms and 0.98 for 3.0 cpd respectively. The critical degrees and contrast sensitivity for 0.7 cpd were 11.3o and 2.8, and 5o and 2.63 for 3.0 cpd respectively.
Conclusions:The critical point in peripheral vision reaches relatively faster than the one in central vision. It is
recommended to train the peripheral retina under the lower spatial frequency more frequently for a short time
than constantly for a long time.
|
|
|
KEYWORD
|
|
|
Eccentric viewing training , Contrast sensitivity , Physiological summation , Rod cell
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|