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KMID : 1159320150170030289
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Korean Journal of Vision Science
2015 Volume.17 No. 3 p.289 ~ p.297
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Effects of Smartphone Usage with Contents and Smartphone Addiction on Accommodative Function
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Kang Yu-Jin
Leem Hyun-Sung
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Abstract
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Purpose: This study was aimed at investigating the change of accommodation function that has arisen when different stimulations such as video and e-book contents using the smartphone were given to the smartphone addiction groups.
Methods: The ‘smartphone addiction diagnostic questionnaire’ was conducted upon 56 adults who had neither the experience of ophthalmology related surgery nor ophthalmopathy, and subsequently they were classified into the normal user group and the risk group. Then, they were asked to watch video and e-book contents using the smartphone, and the changes of their accommodation function and subjective fatigue were examined.
Results: Accommodative response, amplitude of accommodation, accommodative lag, negative relative accommodation and binocular accommodative facility displayed significant differences (p<0.05) after watching the video contents while accommodative response, amplitude of accommodation, accommodative lag and negative relative accommodation showed significant differences (p<0.05) after reading the e-book contents. However, there was no significant difference in the changes of the accommodation function between the two contents. It was shown that the accommodation function
tended to be lowered when the smartphone addiction was more severe, and to be more substantially reduced after watching the smartphone.
Conclusions: Irrespective of the stimulation by various contents, the use of the smartphone results in the change of accommodation function. The accommodation function tended to be lowered when the smartphone addiction was more severe, and to be more substantially reduced after using the smartphone. It is considered that further studies are needed to investigate what impact the smartphone addiction has on the binocular function by continuous selection of the risk group.
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KEYWORD
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Smartphone, Smartphone addiction, Contents, Accommodative function, Fatigue
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