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http://dx.doi.org/10.14479/jkoos.2014.19.4.505

A Study on the Change of Contrast Sensitivity with Breath Alcohol Concentration in Various Luminance  

Nam, Soo-Kyung (Dept. of Optometry, Konyang university)
Jung, Su A (Dept. of Optometry, Konyang university)
Kim, Hyun Jung (Dept. of Optometry, Konyang university)
Publication Information
Journal of Korean Ophthalmic Optics Society / v.19, no.4, 2014 , pp. 505-511 More about this Journal
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.
Keywords
Breath alcohol concentration (BrAC); Watson equation; Contrast sensitivity;
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