Journal of Korean Ophthalmic Optics Society (한국안광학회지)

The Korean Ophthalmic Optics Society (한국안광학회)
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Characteristics of Accommodative Lags Determined by Objective and Subjective Methods and Their Correlation

타각적 및 자각적으로 결정된 조절래그의 특성과 상관관계

  • Yu, Dong-Sik (Dept. of Optometry and Vision Science, Kyungwoon University) ;
  • Kwak, Ho-Weon (Dept. of Optometry and Vision Science, Kyungwoon University) ;
  • Roh, Byeong-Ho (Dept. of Optometry and Vision Science, Kyungwoon University) ;
  • Son, Jeong-Sik (Dept. of Optometry and Vision Science, Kyungwoon University)
  • Received : 2015.07.28
  • Accepted : 2015.09.01
  • Published : 2015.09.30
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Abstract

Purpose: The aim of this study was to evaluate clinical characteristics of subjective accommodative lags determined by fused cross-cylinder (subjective method), and an open-field autorefractor (objective method) under uncorrected and corrected conditions. Methods: Thirty three healthy subjects (26 males and 7 females aged $23.73{\pm}1.35$ years from 22 to 27 years) participated. Four methods were used to determine accommodative lag: (1) a subjective method with the fused cross-cylinder (FCC) under +2.00 D fogging lenses condition, (2) an objective method with the autorefractor under uncorrected condition (3) a corrected method (effective accommodative lag) using equations presented by Gwiazda et al. in objective methods, and (4) a corrected method using equations presented by Mutti et al. in objective methods. Results: The mean accommodative lags were 0.72 D for subjective method, 0.82 D for uncorrected objective method, 0.88 D for corrected method with Gwiazda's equations, and 0.78 D for corrected method with Mutti's equations. There were significant differences between the objective accommodative lags, but no significant differences between the objective and subjective accommodative lags. The effective accommodative lags showed significant correlations between phorias and refractive errors. The effective accommodative lag by Mutti's equations had a high correlation with uncorrected accommodative lags (r=0.99, p<0.001). Conclusions: The objective accommodative lag correlated with phorias and refractive errors. Especially, The effective accommodative lag using Mutti's equations may be considered for clinical availability and qualitative evaluation associated with symptoms.

목적: 양안크로스실린더법으로 결정된 자각적 조절래그와 개방형 자동굴절계를 이용하여 결정된 타각적 조절래그를 미보정한 값과 보정한 값을 대상으로 임상적으로 그 특성을 평가하고자 하였다. 방법: 건강한 33명(남 26명, 여자 7명, 22~27세의 평균 나이 $23.73{\pm}1.35$세)을 대상으로 하였다. 조절래그는 4가지 방법 (1) +2.00 D 운무와 양안크로스실린더를 이용한 자각적 방법, (2) 자동굴절계로 측정한 미보정 타각적 방법, (3) 타각적 방법에서 Gwiazda 등이 제시한 식으로 보정한 방법(유효 조절래그)과 (4) 타각적 방법에서 Mutti 등이 제시한 식으로 보정한 방법으로 결정하였다. 결과: 평균 조절래그는 자각적 방법이 0.72 D, 미보정 타각적 방법이 0.82 D, Gwiazda식으로 보정한 타각적 방법이 0.88 D, Mutti 식으로 보정한 타각적 방법이 0.78 D였다. 타각적 조절래그 간에는 유의한 차이를 보였으나 자각적 조절래그와 타각적 조절래그 간에는 유의한 차이를 보이지 않았다. 유효 조절래그는 사위도와 굴절 이상 간에 유의한 상관관계를 나타내었고, Muttii 등이 제시한 식으로 보정한 타각적 조절래그는 보정하지 않은 타각적 조절래그와 높은 상관성을 보였다(r=0.99, p<0.001). 결론: 타각적 조절래그는 사위와 굴정이상과 상관관계가 있으며, 특히 증상과 관련하여 임상적 활용과 정량적 평가에 Muttii 등이 제시한 타각적 유효 조절래그를 고려하여야 할 것이다.

Keywords

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