The aim in this project was to investigate the viability of using changes in visual system function as a measure of alcohol intoxication. The best candidate measures of changes in visual function as a result of consuming alcohol were identified from the literature. These were aspects of motor and autonomic visual system function. These abilities were measured with standard clinical tests in experiment 1. Young male students who defined themselves as social drinkers were randomly assigned to control and two alcohol groups (low and moderate BAL). They completed a baseline visual function test and 2 post-alcohol tests in the experimental session. Results of experiment 1 showed significant changes to the functions of latent eye position, range of binocular movement and speed of fast voluntary eye movements. No significant change to induced pupil oscillations was demonstrated. Changes were more marked in the moderate BAL group than the low BAL group. There was no significant change in these abilities in the control group. Experiment 2 was designed to investigate whether these aspects of visual function are susceptible to expectancy effects as performance tests have been found to be.