Can consuming alcohol affect a driver's field of vision?

The question is about the effect of alcohol on a driver's field of vision. Alcohol affects the nervous system: it slows down reactions, worsens coordination and narrows the field of vision - the driver focuses their eyes on what is in front of them and stops noticing what is happening at the sides, for example a pedestrian stepping off the pavement. This is called tunnel vision. The answer is: yes.

The Road Traffic Act prohibits a person who is intoxicated or after drinking alcohol from driving a vehicle, which means from as little as 0.2 per mille in the blood. Even a small amount worsens the sharpness of vision, lengthens the time the eyes need to adjust to changes in lighting and weakens vision at dusk, and as the concentration rises, the field of vision becomes narrower and narrower. A driver who has been drinking therefore sees less and later, and at the same time feels more confident - this combination is responsible for many tragic accidents. The only safe rule is: if you have been drinking, do not drive.

Legal basis: Art. 45 para. 1 point 1 of the Road Traffic Act (Prawo o ruchu drogowym); Art. 46 para. 2 and 3 of the Act on Upbringing in Sobriety and Counteracting Alcoholism