난시안의 최소착락원과 교정시력과의 관계 연구 (A Study on the Relationship between the Disc of Least Confusion and Corrected Vision of Astigmatism)

서지정보

· 발행기관 : 한국안광학회
· 수록지 정보 : 한국안광학회지 / 13권 / 2호 / 51 ~ 57페이지
· 저자명 : 김정희, 김인숙

초록

목적: 본 연구는 난시안의 교정 시 안정피로를 최소화하고 선명한 시생활 제공을 위한 적정 처방을 위해 최소착
락원의 크기와 위치가 시력에 미치는 영향을 알아보고자 실시하였다. 방법: 경기도에 재학 중인 20대에서 40대 사
이의 근시성 난시를 가지고 있는 남, 녀 대학생 68명(136 eye)을 대상으로 난시안의 최소착락원 크기와 위치에 따
른 교정시력의 변화를 알아보기 위하여 난시를 완전교정한 후의 교정시력과 난시축은 변화를 주지 않고 난시량 만
을 0.25D, 0.50D 감소한 상태의 시력, 난시량을 0.50D 저교정 함과 동시에 구면렌즈 −0.25D를 추가 장입했을 때의
시력을 측정하였다. 결과: 난시량의 교정상태에 따른 평균시력은 난시량을 완전교정했을 때 1.047이었고, 0.25D 저
교정 했을 때는 0.914, 0.50D 저교정했을 때는 0.772로 최소착락원이 클수록 시력감소폭이 컸으며, 난시안에서 교
정시력은 최소착락원의 크기와 상관관계가 있다는 것을 알 수 있었다. 난시안에서 최소락원의 위치에 따른 평균시
력은 난시량이 완전교정되어 점(point) 상태로 상이 망막위에 형성되었을 때는 1.047이었고, 난시량이 0.50D 저교정
상태 즉, 최소착락원이 망막 앞에 형성되었을 때는 0.772, 난시량이 0.50D를 저교정하고 최소착락원이 망막 위에 형
성되었을 때는 0.828로 조사되었다. 즉, 난시량의 저교정 상태가 같을 경우 최소착락원 형태의 상이 망막 위에 형성
되었을 때가 망막 앞에 형성되었을 때 보다 시력감소가 적은 것으로 조사되었다. 결론: 난시안의 장용검사에서 원
주렌즈 굴절력을 감소할 경우 최소착락원을 망막 위에 위치시키는 구면렌즈의 조정이 반드시 필요하다.

영어초록

Purpose: This study has been conducted to know how the size and position of the circle of least confusion has
an influence on the vision for minimization of asthenopia when astigmatism is corrected and appropriated
prescription to provided clear vision life. Methods: The method of the study has been worked on 68 students
(136 eyes) of man and woman enrolled in university of Gyeong-gi-do aged 20 to 40, who have myopic
astigmatism in order to know how the corrected vision changes according to the size and position of the circle of
least confusion of astigmatism, the vision has been tested by giving the vision whose astigmatic power of 0.25D
and 0.50D was just reduced, low correcting the astigmatic power into 0.50D, and at the same time inserting
additionally spherical power −0.25D, all under a condition that the corrected vision after completely corrected
astigmatism, and the axis of astigmatism was not changed. Results: The average vision was 1.047 when the
astigmatic power was fully corrected, and in low correction of 0.25D, it was 0.914, and in low correction of 0.50,
it was 0.772. It has been learned that the bigger the circle of least confusion was the bigger the range of vision
reduction and the corrected vision in astigmatism has correlation with the size of the circle of least confusion. It
has been examined that the average vision according to position of the circle of least confusion in astigmatism
was 1.047 when the astigmatic power was completely corrected and focused on the retina with state of point, and
in case that the astigmatic power was 0.50D of state of low correction, that is, the circle of least confusion was
focused before retina, it was 0.828, and it was also 0.826 when the astigmatic power is low corrected with 0.50D
and the circle of least confusion was focused on the retina. Explained briefly, It has been examined that in case
that the state of low correction of the astigmatic power was same, the vision reduction was less in the image of
the circle of least confusion focused upon the retina than in the image of its being focused before the retina.
Conclusions: In case that the refractive power of cylindrical lens is reduced in test of wearability in astigmatism,
there needs surely an adjustment of spherical lens that can place the circle of least confusion on the retina.

참고자료

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