Alcohol can reduce your ability to distinguish between the colors red and green. This impairment occurs because alcohol affects the functioning of the cones in the retina responsible for detecting these colors, disrupting communication between the eyes and the brain
. Studies have shown that alcohol consumption, especially in large amounts or chronic use, leads to difficulties primarily in distinguishing red and green hues, which is particularly critical for activities such as boating where these colors are used for navigation lights and safety signals
. Additionally, some research notes that alcohol can also affect blue-yellow color perception, but the most commonly affected colors are red and green
