As the saying goes, “the eyes – a mirror of the soul”, but their importance is much more than a well-known saying goes. They allow us to see the world, to distinguish colors, shapes and sizes, and learn of loved ones, and much, much more. We offer learn more about the amazing features of our devices.
1. Eye color may vary. In the human eye there are never either blue or green pigments. Eye color depends on the light conditions and many other factors, especially if the eyes – light.
2. If your eyes – blue, you share a common ancestor with any other blue-eyed person in the world. The first man, who had blue eyes, lived about 6000-10000 years ago. Before that, everyone had brown eyes.
3. Each eye is composed of 107 million cells, and they are very sensitive. 7000000 “cones” helps us to see color and detail, and the remaining 100 million cells help distinguish only black and white. Thus, less than one tenth of our visual receptors actually detects color.
4. Vision acuity with 20/20 – normal vision. This number is largely arbitrary, but ophthalmologists have decided that people should be able to read a chart at a distance of 20 feet. That should be the normal eyesight under normal light conditions.
5. If you wear glasses, turns the image upside down, your brain will correct vision. Even though you will see things upside down, the brain will eventually adapt and begin to operate as if you see things correctly (even though it does not). A series of experiments confirmed this fact.
6. We blink average of 17 times per minute, and is 14280 times per day and 5.2 million times per year. Fun fact: we blink more when speaking than when we are silent.
7. People say, “in the blink of an eye” because it is the fastest muscle in the body. Blink usually lasts 100-150 milliseconds, and may blink 5 times a second.
8. We need reading glasses as they age. Approximately 99% of the population aged 43 to 50 are needed these glasses. This is because with age, the lens in the eye slowly loses its ability to focus.
9. Lens of the eye is much faster than any camera. It focuses on the objects to which we look. Take a moment to look around the room and think about the different distances at which you concentrate. Each time you do this, the lens adjusts the eye immediately, even though you do not even know about it. Compare this process with the camera lens, which requires a few seconds to focus between one distance to the next.
10. Blink – an extremely important function of an eye. It helps remove any objects dropped into the eye by spreading tears on them. Tears also help to moisturize and lubricate the eyes and to have significant antibacterial properties.
11. All cataracts are formed during aging. This is a normal, natural variation. The average age of the formation of cataracts in humans – about 70 years.
12. Diabetes is often diagnosed for the first time was during an eye examination. For example, type 2 diabetes showed small hemorrhages from leaking blood vessels behind the eye.
13. It may not seem obvious, but is often due to poor eyesight eye not at all. Visual impairment can occur from something going wrong, as it should, in the visual cortex. There are many disorders of the brain associated with the visual system.