VERGENCE AND ACCOMMODATION .6. INFLUENCE OF ETHANOL ON AC/A RATIO

Haploscope measurements of accommodation and accommodative vergence over a range of stimuli to accommodation were carried out on six young adult observers at various levels of alcoholic intoxication. In all cases there was a decrease in response AC/A proportional to the level of blood ethanol. A change in blood ethanol of 0.01 gm/100 cc is, on the average, associated with about a 5% decrease in AC/A. Each subject also demonstrated an increase in tonic convergence which returned to the baseline or overshot before the blood ethanol level returned to zero. © 1969, American Medical Association. All rights reserved.