|
KMID : 1011420090140040045
|
|
Journal of Korean Ophthalmic Optics Society
2009 Volume.14 No. 4 p.45 ~ p.51
|
|
|
Clinical Performance Analysis of Lens for Improving VDT Syndrome
|
|
Ryu Geun-Chang
Park Ji-Hoon
Jun Jin
Jin Moon-Seok
Chae Soo-Chul
|
|
|
Abstract
|
|
|
Purpose: The purpose of this study is to compare and analyze the survey results of clinical performance and visual problem, and the survey were carried out before and after of VDT working for 4 hours by wearing functional lens designed for improving VDT syndrome and single-vision lens.
Methods: We tested near & far visual acuity, change of spherical equivalent, near point of accommodation, near point of convergence, AC/A ratio, accommodative facility and survey of subjective symptoms to visual problem of before and after VDT working for 4 hours after wearing single-vision lens and functional lens subjected on 30 males and females in the age of 20 to 45.
Results: When wearing functional lens comparing to single-vision lens, near visual acuity, near point of accommodation, near point of convergence, and accommodative facility are significantly improved. It is investigated that average scores of 10 items to visual problem after VDT working for 4 hours are 3.63?0.75 at single-vision lens and 4.69?0.83 at functional lens, and therefore functional lens is significantly improved.
Conclusions: It is thought that functional lens is an excellent lens which helps to improve accommodative function and visual problem after VDT working for 4 hours than single-vision lens.
|
|
|
KEYWORD
|
|
|
Accommodation, Accommodative facility, Functional Lens, Near point of accommodation, Near point of convergence, Visual display terminal syndrome
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|