Journal of Korean Ophthalmic Optics Society (한국안광학회지)

The Korean Ophthalmic Optics Society (한국안광학회)
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A Study on the Change of Contrast Sensitivity with Breath Alcohol Concentration in Various Luminance

다양한 휘도에서 호흡 알코올 농도에 따른 대비감도 변화 연구

  • Received : 2014.10.29
  • Accepted : 2014.12.10
  • Published : 2014.12.31
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Abstract

Purpose: This study was to investigate the effect of breath alcohol concentration (BrAC) increase with drinking alcohol on contrast sensitivity in the conditions of restricted BrAC. Methods: 23 males in 20s (average age $21.17{\pm}2.19$ years, body mass index (BMI) $22.09{\pm}2.16$) were selected and administered the amount of alcohol to reach 0.05% and 0.08% BrAC calculated by BAC (blood alcohol concentration) Dosing Software program, which was developed as basis of Watson's formula. Then, the contrast sensitivity in various luminance conditions (photopic, mesopic, and mesopic with glare) was measured and compared between these conditions. Results: The contrast sensitivity in all spatial frequency was decreased with BrAC increase. Although BrAC was increased, the peak of contrast sensitivity didn't change as 6 cycle per degree (cpd) in the photopic condition and 3 cpd in the mesopic condition, respectively. But, in the mesopic condition with glare, the peak of contrast sensitivity was shifted from 6 cpd at 0% and 0.05% BrAC to 3 cpd at 0.08% BrAC with increase of alcohol concentration. Conclusions: The increase of BrAC by drinking alcohol induces the decrease of contrast sensitivity in all spatial frequency and the shift of peak of contrast sensitivity, which can cause safety accidents, and may have an effect on various visual tasks.

목적: 호흡 알코올 농도를 제한한 상태에서 알코올 섭취로 인한 호흡 알코올 농도(breath alcohol concentration, BrAC) 증가가 대비감도에 미치는 영향을 알아보았다. 방법: 20대의 남성 23명(평균연령 $21.17{\pm}2.19$세, body mass index(BMI) $22.09{\pm}2.16$)을 대상으로 Watson 공식을 기반으로 개발된 BAC(blood alcohol concentration) Dosing Software를 이용하여 호흡 알코올 농도 0.05%와 0.08%에 도달하기 위한 알코올 양을 산정하여 투여한 후 다양한 휘도(명소시, 박명시, 박명시 눈부심) 상태에서 대비감도를 측정하여 비교 분석하였다. 결과: 호흡 알코올 농도가 증가할수록 모든 공간주파수에서 대비감도는 감소하였다. 정점대비감도는 명소시 상태에서 6 cycle per degree(cpd), 박명시 상태에서 3 cpd로서 호흡 알코올 농도가 증가하여도 정점이동이 나타나지 않았지만, 박명시 눈부심 상태에서는 0%와 0.05%에서는 6 cpd, 0.08%에서는 3 cpd로서 호흡 알코올 농도 증가에 따른 정점이동이 나타났다. 결론: 음주에 의한 호흡 알코올 농도 증가는 모든 공간주파수에서 대비감도의 감소와 정점대비감도의 이동을 유발함으로써 다양한 시작업에 영향을 미치고 안전사고의 원인이 될 수 있으므로 주의하여야 한다.

Keywords

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