To assess visual performance in low-illumination conditions, the researchers used a visual test known as a "halometer".
The results, published in the Journal of Ophthalmology, showed that following alcohol consumption, the perception of halos and other night-time visual disturbances increased.
Researchers also found that the optical quality of the image the eye produces deteriorated.
"Alcohol consumption and low-illumination conditions are factors present in many traffic accidents, hence people must to be made aware of the effects of alcohol consumption, especially on vision," Castro said.
