How Alcohol Worsens Night Vision Among Drunk Drivers

Night Vision Goggle

It’s because alcohol disturbs the tear-film that covers the surface of their eyes, leading to deterioration of vision. Alcohol consumption markedly impairs night-vision because it increases the perception of halos (luminous circles) and other visual night-time disturbances, a new study shows. “This is because ethanol from alcoholic drinks passes into the tear and disturbs the outermost layer of the tear-film – the lipid layer – facilitating the evaporation of the aqueous part of the tear,” said principal author of the study Jose Juan Castro from University of Granada, Spain. In an eye with a deteriorated tear-film, the quality of the image that forms in the retina also deteriorates.
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Alcohol consumption markedly impairs night-vision because it increases the perception of halos (luminous circles) and other visual night-time disturbances, a new study shows. DH graphic for representation only

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