Why do eyes get red when drinking?

In fact, blushing after drinking is due to the lack of acetaldehyde dehydrogenase in the body. Because alcohol is called ethanol, after it is drunk in the body, it first becomes acetaldehyde through alcohol dehydrogenase, then becomes acetic acid through acetaldehyde dehydrogenase, and finally is excreted.

Alcohol dehydrogenase and acetaldehyde dehydrogenase are both enzymes secreted by the liver. The lack of acetaldehyde dehydrogenase will lead to the slow conversion of ethanol into acetaldehyde and then into acetic acid, that is, acetaldehyde accumulates in the body, leading to telangiectasia and facial redness.

The eyes are rich in blood vessels, so the eyes are particularly red after drinking because the blood vessels are dilated. This kind of person drinks as little as possible, and it is not recommended to drink in large quantities, which is very harmful to the health.

Extended data:

Because alcohol is very soluble in water, and the water content of vitreous body in eyeball reaches 99%, it has a strong affinity for alcohol, so drinking alcohol is very easy to damage eyes. When people drink a lot of alcohol, the eyeball will congest the conjunctiva, which can cause local tissue hypoxia.

At the same time, drinking will consume a lot of B vitamins in the human body. When the eyes are deficient in B vitamins, optic neuritis and lens opacity are easy to occur.

In addition, harmful alcohol in wine (such as methanol) will also have obvious toxic effects on retina and optic nerve. If you drink too much, the harmful ingredients in the wine will shrink the optic nerve and seriously lead to blindness.

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Ask the doctor-why do eyes get red after drinking?