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KMID : 1011420130180040405
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Journal of Korean Ophthalmic Optics Society
2013 Volume.18 No. 4 p.405 ~ p.411
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Study on Mounting Status of Trial Case Lenses
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Cho Hyun-Gug
Moon Byeong-Yeon
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Abstract
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Purpose:In this study, the mounting status of trial case lens was investigated.
Methods:We measured distances
between geometric center of lens mount and optical center of lens and angle deviations between axis mark on
lens and real axis using arbitrary trial case lens sets distributed in Korea, and then, compared those results with
international standards.
Result:In some of lenses, the prismatic power on geometric center of lens mount and
the angle deviations between axis mark and real axis of cylindrical lens were out of tolerance according
international standards.
Conclusions:The more precise control of the manufacturing process and more thorough
quality control for trial case lenses will be required to offer an accurate vision test.
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KEYWORD
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Trial case lens , Tolerance , KS , ISO
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