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Kim, Hwang, and Song: The Changes of Corneal and Ocular High-Order Aberrations before and after Playing Computer Games
Original Article
Journal of the Korean Ophthalmological Society

Journal of the Korean Ophthalmological Society 2012; 53(11): 1597-1602.

Published online: 19 November 2012

DOI: https://doi.org/10.3341/jkos.2012.53.11.1597

The Changes of Corneal and Ocular High-Order Aberrations before and after Playing Computer Games

Min Seo Kim1, Young Hoon Hwang, MD2, Jong Suk Song, MD, PhD3

1School of Life Science, Handong Global University, Pohang, Korea.

2Department of Ophthalmology, Kim's Eye Hospital, College of Medicine, Konyang University, Seoul, Korea.

3Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea.

Address reprint requests to Jong Suk Song, MD, PhD. Department of Ophthalmology, Korea University Guro Hospital, #148 Gurodong-ro, Guro-gu, Seoul 152-703, Korea. Tel: 82-2-2626-1277, Fax: 82-2-857-8580, crisim@korea.ac.kr

Received 26 September 2011       Accepted 18 September 2012

Copyright © 2012 The Korean Ophthalmological Society

Abstract

Purpose

To evaluate changes in corneal and ocular high-order aberration, ocular fatigue, and tear break-up time (TBUT) before and after playing computer games and the correlations among the variables.

Methods

Thirty-nine normal healthy subjects played computer games for 1 hour. Ocular fatigue was evaluated with a questionnaire, TBUT was measured with slit-lamp biomicroscopy, and high-order aberrations were measured with a KR-1W aberrometer (Topcon Medical System, Inc., Tokyo, Japan) in each subject before and after playing computer games. The right eye was used for statistical analyses.

Results

Subjective ocular fatigue (expressed as the interview score) increased from 4.23 ± 5.35 to 12.05 ± 8.68 after playing games (p < 0.001) and TBUT decreased from 8.03 ± 6.43 sec to 4.90 ± 3.31 sec (p < 0.001). Ocular high-order aberrations in the 4 mm and 6 mm zones were not significantly changed before and after playing games (p = 0.150, p = 0.202, respectively). However, corneal high-order aberrations in the 4 mm and 6 mm zones were significantly increased after playing computer games (p = 0.002, p = 0.002, respectively). Changes in TBUT, interview score, and corneal high-order aberration were not correlated with each other.

Conclusions

Playing computer games increased corneal high-order aberrations as well as subjective ocular fatigue and TBUT.

Keywords: Computer games, Corneal aberration, Dry eye, High-order aberration

Figures and Tables

Figure 1
KR-1W aberrometer (A) and an image of aberration map (B).
jkos-53-1597-g001
Table 1
Questionnaire for evaluating ocular fatigue
jkos-53-1597-i001
Table 2
Blinking count, break-up time, ocular protection index, interview score and spherical equivalent before and after computer game
jkos-53-1597-i002

Values are presented as mean ± SD.

BUT = tear break-up time; OPI = ocular protection index.

Table 3
The changes of ocular, corneal, and internal high order aberration before and after playing computer games
jkos-53-1597-i003
Table 4
Correlation coefficients between changes of corneal high order aberration and other values
jkos-53-1597-i004

All values p > 0.05.

DiffCor 4 mm = corneal aberration difference in 4 mm; DiffCor 6 mm = corneal aberration difference in 6 mm; PreBUT = pregame break-up time; PostBUT = postgame break-up time; PreInterv = pregame interview score; PostInterv = postgame interview score; PreOPI = pregame ocular protection index; PostOPI = postgame ocular protection index; DiffBUT = break-up time difference; DiffInterv = interview score difference; DiffOPI = ocular protection index difference.

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