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KMID : 1159320210230010121
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Korean Journal of Vision Science
2021 Volume.23 No. 1 p.121 ~ p.128
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Survey on the Actual Condition of Ready-Made Reading Glasses
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Wi Dae-Gwang
Song Yun-Young
Jung Mi-A
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Abstract
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Purpose:In this study, in order to find out the necessity of using reading glasses according to the correct prescription, the variables of the users of the ready-made reading glasses were measured and analyzed for those who are using the ready-made reading glasses.
Methods:A total of 50 subjects over 45 years of age were selected, and refraction tests, maximal accommodation, near addition, and near PD were measured. In addition, the distance between center points of the ready-made reading glasses frames and the distance between the optical center points of the glasses were measured.
Results:As a result of checking the clearest distance according to the purchase period of the ready-made reading glasses, the clearest distance became longer as the period of purchase increased. As a result of comparing the distance between the reference points of the glasses frames and the distance between the optical center points of the ready-made reading glasses, the larger the distance between the reference points of the frames, the larger the distance between the optical center points. It was found that 71.00% had a difference of 2mm or more. In addition, as a result of confirming the inducing prism affecting binocular vision, BO△ was induced in 80.00%, BI△ was induced in 16.00%.
Conclusion:This study was able to confirm the eye strain caused by the different refractive power and PD between the ready-made reading glasses and the actual prescription glasses for near vision use. Therefore, standards for selling ready-made reading glasses, including online and it is necessary to improve the quality of national security services by strengthening the expertise of optometrist to prevent the use of ready-made reading glasses which may adversely affect eye health.
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KEYWORD
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Addition, Maximum accommodation, Optical center distance, Prism, Reading glasses
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