Effects of Smoking and Drinking on the Critical Fusion Frequency.

Youn, Won Shik

Original Article

Journal of the Korean Ophthalmological Society 1973;14(2):81-85.
Published online January 1, 2001.

Effects of Smoking and Drinking on the Critical Fusion Frequency.

Won Shik Youn

Department of Ophthalmology, College of Medicine, Seoul National University, Seoul, Korea.

Critical Fusion Frequency 에 관한 연구 - 특히 끽연과 음주가 미치는 영향에 대하여 -

Abstract

Critical fusion frequency was measured in young subjects before and after smoking and drinking. The test light is directed to a round opaque plate, 40mm in diameter, which the subject views at a distance of 50cm in a semi-darkend room, the light-dark ratio being 1 : 1. Nineteen subjects were investigated on the effect of cigarette smoking. Of these, an increases in frequency was noted in 10, a decrease in 3, and no alteration in 1. The frequency returned to the normal level in about 10 minutes. After drinking 35ml of 90 proof whisky, 11 out of 16 subjects revealed a increase, 1 revealed a decrease, and 4 showed no alteration. There is no definite relationship between the habit of smoking or drinking and the behavior of the changes in the frequency.