Even after many years of studying the human body, there are still many unsolved mysteries. However, it is certainly clear that the amazing biological machine that he represents, – a creation well thought out and extremely interesting.
Human eye – an important detail of this machine, thanks to which we are able to perceive the world and receive information about the environment visually. Interesting facts about the eyes that estet-portal.com has collected for you in this article will help you learn more about eyes and vision.
Interesting facts about eyes and vision: look at yourself from a different angle
- Blue eyes – the result of a genetic mutation (the HERC2 gene), in which little melanin is produced in the iris of the eye.
- Brown – the most common eye color.
- Flies before the eyes – shadows cast by particles floating inside the eye.
- If cold water is poured into the ear, the eyes move in the direction of the other ear, and if warm water is poured into it – in the direction of the ear into which the water was poured. This eye fact is used to test for brain damage (caloric test).
- If you look directly at the camera while taking a photo and the picture shows one eye is red and the other is normal or yellow, it may indicate eye cancer.
- With 98% accuracy, schizophrenia can be diagnosed with an eye test (if unusual eye movements are detected).
- Brown eyes can be permanently turned blue with a special procedure using a laser.
- A rare genetic mutation allows 2% of women to see 100 million colors thanks to extra retinal cones.
- Johnny Depp is blind in his left eye and nearsighted in his right.
- Smooth movements of the human eye are only possible while observing a moving object.
- Due to the lack of gravity, you can't cry in space. Tears just collect into small balls and cause discomfort in the eyes.
- Pirates used blindfolds to "train" one eye for bright light (on deck) and the other – for subdued lighting below decks.
- The flashes of light you see when you rub your eyes are called phosphene.
- Sometimes people with aphakia (lack of the lens) see ultraviolet light.
- When we look at a loved one, the pupil dilates by 45%.
- The number of photosensitive cells in the eye is approximately 107 million.
- The brain is able to get used to an inverted picture over time, after a period of adaptation, it automatically flips the image and the person sees it normally, despite the fact that it is turned upside down.
- Blinking muscle – the fastest, a human can blink 5 times per second.
- Reading glasses are needed by 99% of older people due to the reduced ability of the eye to focus.
- The lens focuses faster than any camera.
- Newborns do not produce tears until the age of 4 – 13 weeks.
- A person with heterochromia has different eye colors from birth.
- The muscles that control eye movements are the most active in the body.
- When necessary, I transplant the cornea of sharks to people (they are so similar to each other).
- Sneezing with your eyes open won't work.
- Newborns are color blind.
- The human eye can distinguish 500 shades of gray.
- One of the 12 men – colorblind.
- All the colors we can see are combinations of red, blue and green.
- There is a blind spot on the retina where the optic nerve attaches.
- The size of the eyes does not change after birth.
- The iris has 256 unique characteristics (fingerprint has 40), so eye scanning is often used for security purposes.
- A person reads 25% slower on a computer monitor than on paper.
- Depression literally makes you see everything in dim colors (experimentally confirmed).
- Bees have tiny hairs on their eyes that determine wind direction and flight speed.
- Most white cats with blue eyes (65-85%) are deaf.
- Many animals (ducks, dolphins, iguanas) sleep with one eye open to spot a predator at the right moment.
- The human eye does not sense temperature.
If you know any other facts about human eyes and vision, share them in the comments!
And also Know yourself better: 38 little-known facts about the human body
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