33 percent of people are affected by the strange disease, are you one of them?


A third of people can react strangely, even in winter, when exposed to the sun. We show the symptoms. Do you know me personally?

Many people react strangely to sudden, intense light. If it is simply enough to close our eyes and the discomfort disappears, there is no problem. If you have to sneeze constantly when you go from dark to light, it’s probably already We suffer from ACHHO syndrome.

Sneezing at light is independent of age, it can also affect children if they are prone to itAttila Barabas / Getty Images Hungary

It was already known to the Greeks

The acronym comes from the name of the disease, the tendency to sneeze caused by sudden light because it is called Autosomal dominant compelling helio ophthalmic outburst syndrome. The photic sneeze reflex is a reaction of our body to light, which is accompanied by a sneeze stimulus and involuntary sneezing. Aristotle was the first to deal more seriously with the phenomenon, and wrote down the symptoms Problems in his volume. He even called the phenomenon a solar sneeze. He assumed that the heat of the sun causes sweating in the nose, which stimulates the olfactory organ, which gets rid of mucus by sneezing. Francis Bacon only refuted the ancient philosopher in the 17th century, a fairly simple experiment after. He looked at the sun with his eyes closed, and sure enough he didn’t sneeze. He realized that the cause of the phenomenon should not be sought in the nose, but in the eyes. He also discovered that looking at the sun causes tears to leak through the tear ducts into the nose and trigger him to sneeze.

Bacon wasn’t right either

We had to wait until the 20th century to unravel the relationship between reflexive splashing and light, as it was then proven that the reaction is too fast to to allow moisture to flow through the tear ducts.

In 1964, Henry Everett first called the phenomenon light-induced sneezing, and based on his investigations, we know that it is a nervous system symptom. The eye sends signals to the central nervous system extremely quickly under the influence of sudden, strong light. His results were later confirmed and even further refined. The authors of a 1995 American study, based on research from the University of Alabama, discovered that it is a very common disease, which affects a third of the population of the United States, is basically genetically inherited,

and it is certainly not caused by lacrimation, but by the above-mentioned photic reflex.

THE An investigation by the University of Zurich later clarified it after examining the American results and the European population, it was found out that a fifth of the population here is affected by the nervous system deviation, which is due to a physical characteristic:

The optic nerve of people who sneeze from light and the nerves of the nasal mucosa are too close to each other, so not only the optic nerve but also the mucous membrane reacts to the light. This causes a sudden sneeze.

They believe it is some kind of ancient an inherited trait from prehistoric times. After coming out of the musty cave with heavy air, it could have been especially beneficial if the nose was quickly released from the remains of smoke and dust accumulated inside. Although no one has yet confirmed this belief, continuous research on the disease may bring us closer to a deeper understanding of the phenomenon.

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The article is in Hungarian

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