Abstract
Sixteen abstinent and 24 moderately drinking male subjects have been submitted twice to an elaborate and standardized test run, involving measurements of threshold luminance during the course of dark adaptation, during glare in the dark adapted state, and after glare in the dark adapted state. The greet majority of the paired mean results obtained in this way do not differ significantly, so that our experience contradicts other authors statements claiming on obvious visual disturbance from blood alcohol concentrations as low as 0.045%.