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유발 부등상시에서 영향인자에 따른 입체시의 비교

Comparison of Stereopsis by Influence Factors in Induced Aniseikonia

  • 투고 : 2013.10.31
  • 심사 : 2013.12.14
  • 발행 : 2013.12.31

초록

목적: 정시안에 유발된 부등상시에서 영향인자들이 입체시에 미치는 효과를 알아보고자 하였다. 방법: 안질환 및 전신질환이 없고, 원용 완전교정 굴절력이 등가구면 굴절력 ${\pm}0.50$ D 이내이며, 교정시력이 1.0 이상, AWAYA 부등상시도 1% 이하의 대학생 20명(평균연령 $22.50{\pm}2.72$세, 남자 14명, 여자 6명)을 대상자로 선정하였다. 대상자의 우위안을 원형구멍카드법(Hole in card method)으로 확인한 후, 우위안 또는 비우위안에 각각 -7.00 D ~ +7.00 D의 콘택트렌즈를 착용시켜 굴절부등시를 유발하고 이를 교정하는 안경을 착용하여 부등상시를 유발한 후 Random Dot Stereo Acuity Test with LEA symbols$^{(R)}$(Vision Assessment Corporation$^{TM}$, USA)를 이용하여 입체시를 측정하였다. 결과: 우위안에 부등상시를 유발한 경우, 굴절부등시 유발을 위한 착용 콘택트렌즈 굴절력이 큰 경우, (+) 콘택트렌즈 착용 후 (-) 안경렌즈로 교정한 경우, 남자인 경우에서 부등상시 유발에 따른 입체시의 저하가 더욱 크게 나타났다. 결론: 부등상시는 입체시의 저하를 일으킬 수 있으므로 굴절부등시 교정 시에는 이를 고려하여야 한다.

Purpose: This study was conducted to research effects of influence factors on stereopsis of induced aniseikonia in emmetropia. Methods: 20 college students (a mean age of $22.50{\pm}2.72$ years, 14 males, 6 females) were selected as subjects and all of them had no ocular disease or systemic disease, the refractive correction of spherical equivalent within ${\pm}0.50$ D, the corrected visual acuity of 1.0 or better and the aniseikonia values less than 1% by AWAYA. Subject's dominant eye was checked by Hole in card method and contact lenses of -7.00 ~ +7.00D were fitted to cause anisometropia in dominant eye or non-dominant eye, respectively. And then aniseikonia was induced with spectacles to correct refractive error by contact lenses. Stereopsis was measured by Random Dot Stereo Acuity Test with LEA symbols$^{(R)}$ (Vision Assessment Corporation$^{TM}$, USA). Results: Stereopsis was remarkably reduced by inducing aniseikonia, with induced aniseikonia in dominant eye, with higher diopter of wearing contact lenses to induce anisometropia, with spectacles lenses correction of minus power after fitting contact lenses with plus power and in case of men. Conclusions: It should be considered to correct anisometropia that aniseikonia could cause reduction of stereopsis.

키워드

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  2. The Effects of Uncorrected Astigmatism on Dynamic Stereoacuity vol.22, pp.2, 2017, https://doi.org/10.14479/jkoos.2017.22.2.143
  3. Study of the Correlation of Static Stereoacuity according to the Astigmatism Power and the Degree of Uncorrected Astigmatism vol.23, pp.1, 2018, https://doi.org/10.14479/jkoos.2018.23.1.19