[Curiosities] 10 curiosities about the human eye

[S e u o n g]

The eye is one of the most fascinating organs in both animals and humans. Although usually small compared to the rest of the bodies, they are an essential part for the life and survival of many of the species that inhabit the planet, especially those that we do on the surface.

 

In fact, in humans, the eyes are one of the most developed organs and therefore 50% of the information in our environment is perceived by our vision. But this sense also houses many curiosities. Some, sure, you did not know. We tell you some of its peculiarities.

 

• The eyes have approximately 125 million rods that help us see shapes and 7 million cones that differentiate colors. This makes the human eye capable of distinguishing up to 10 million colors. Of course, then it is up to our brain to interpret them correctly.
• If our eyes were a digital camera, they would be equivalent to a 576 megapixel camera. Far superior to any current development.
• The eyes blink, on average, 17 times per minute. Which is equivalent to roughly 14,000 times a day and 5.2 million in a year. Interestingly, we do it more often by speaking than by reading on paper.
• There is no absolute black color in the iris of the eye. The closest is a very dark brownish-brown.
• According to an evolutionary theory, all people with blue eyes would share a single ancestor dated near the Black Sea region more than 10,000 years ago.
• When we are little, our eyes (and our hair) are much lighter. This is due to melanin: the cells that produce it do so at a very low level of melanocytes. After 6 months they will begin to darken.
• Newborns are not capable of producing tears. As much as it is said that they "cry" they do not secrete this liquid until 4-13 weeks.
• The man's eyes are half a millimeter larger than the woman's.
• Although it sounds cliché, statistically, women are more likely to develop myopia and men, color blindness.
• Type 2 diabetes, in most cases, can only be detected through the eyes, since in the rest of the body it is asymptomatic.