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KMID : 1159320200220030209
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Korean Journal of Vision Science
2020 Volume.22 No. 3 p.209 ~ p.217
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The Effects of Aniseikonia Caused by Various Lenses on Stereoacuity
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Kim Yoon-Kyung
Jang Jun-Gui
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Abstract
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Purpose : To investigate the amount of aniseikonia simulated by the trial lens set and its effect on stereoacuity.
Methods : Forty one normal adult subjects took part to estimate the amount of aniseikonia, stereoacuity by Awaya aniseikonia test and Randotⓡ Stereo test on their dominant eye as independent variables such as refractive index, the lens type of spheric and aspheric lenses and the diopter range from +2.00 D to -2.00 D in one diopter steps varied.
Results : As the absolute value of simulation lens in diopter power increased, the aniseikonia increased while the stereoacuity decreased. For -2.00 D the stereoacuity remarkably decreased(p<0.001). The lower the refractive index was, the less stereoacuity became. The stereoacuity for spheric lenses was lower comparing to aspheric lenses but it was not significant. As aniseikonia increased, the stereoacuity significantly decreased(p<0.001).
Conclusion : There was a difference in aniseikonia simulated by trial lens set, as the type of lenses varied. Therefore, it is considered not only to be helpful but to decrease the Aniseikonia and to improve stereoacuity if characteristics of the lenses are taken account for when to choose spectacle lens.
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KEYWORD
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Aniseikonia, Aspheric lens, Refractive index, Spheric lens, Stereoacuity
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