15 Awesome Facts about Human Eye

By – Onkar Dureja

Vision is so fundamental to the human experience that sometimes we take our eyes without any consideration. The human eye may be a highly complex organ that gives us with the power to experience the planet in ways in which our other senses cannot. Albeit we use of our eyes during the bulk of our waking hours, there are variety of fun and interesting belongings you might not have realized about your eyes, and the way they function. 

1. The Human Eye Can Identify 10 Million Different Colors

                                              

While there are several theories on the subject, studies supported the work of Gunter Wyszecki suggest that we will distinguish as many as 10 million colors. All colors within the light spectrum visible to humans are made from combinations of red, green, and blue. Once we see yellow it's a mixture of red and green, whereas purple may be a combination of red and blue, and so on. One common misconception is that color may be a property of sunshine when it actually features a lot to try to with the brain. It's not just the wavelength of the sunshine rays that are reflected into the attention, but also the context during which we perceive things like background colors, lighting, familiarity, and surroundings.

2.Your Eyes Can Get Sunburned

Sunburn of the skin is now well understood but did you recognize you'll also get sunburn of the attention. The condition is named photo keratitis and may cause pain, redness, blurriness, tearing, swelling and sensitivity to light. A bit like how your skin can peel after sunburn, photo keratitis can cause the corneal epithelium, “sloughing off.” Effects are often felt long after exposure, so always wear good sunglasses when within the sun.

3. 80% of All Visions Impairment is often Prevented or Cured

The World Health Organization (WHO) estimates that quite 80% of all visions impairment around the world are often prevented and even cured. The WHO highlights variety of successful public-private partnerships that have caused real change in a eye health for those countries who encouraged them. Such measures have led to substantial reduction in onchocerciasis and trachoma-related blindness and a consequent reduction within the spread of infectious diseases.

 

4.Are Carrots Actually Good For Your Eyes?

Many folks are mentioned being told that carrots are the simplest food for eyesight, even that eating carrots will help us see within the dark. While the beta-carotene rich vegetable may be a healthy addition to your diet, it doesn't have specific benefits for the eyes apart from vitamin A, which is converted from beta-carotene within the body, but there are far better sources of vitamin A. For eye health it's best to eat oily fish, and green vegetables that contain lute in, zeaxanthin and meso-zeaxanthin, which support the eye’s protective mechanisms. Lutein and zeaxanthin occur naturally in foods like spinach, kale, and other leafy greens, while meso-zeaxanthin are often found in certain fish. 

5.Using Screens Causes Computer Vision Syndrome

Studies suggest that fifty to 90% of individuals who work on a display screen show symptoms of computer vision syndrome (CVS). CVS isn’t one specific problem but an entire range of issues concerning eye strain and pain from an excessive amount of exposure to screens. Using a screen forces your eyes to focus and refocus all the time, the brightness and glare also makes your eyes work harder, over time this repetitive strain can take a toll on your eye muscles.

6. We Blink Between 20,000 and 30,000 Times a day

Scientist have estimated that we blink between 20,000 and 30,000 times per day on the average. Each blink lasts just two-tenths of a second but that adds up to approximately 1.5 hours per day. Blinking removes dirt, and lubricates the attention with moist tears. Each blink brings nutrients to the attention surface structures keeping them healthy. One study even found a neurological function for blinking. It suggests that the parts of the brain connected to vision and a spotlight undergo a mini reset that would be fundamental to how the brain functions.

 

7. The Eyes Perceive Things the wrong way up

What we see are made from light reflected from the objects, and scenes we glance at. However, because of the cornea at the front of the attention is curved. It bends the sunshine because it enters eye, meaning the image is the wrong way up when it hits the retina at the rear of the attention. When the brain interprets the image it turns it back the proper high, so we see the planet correctly. In an experiment within the 1950s, Austrian Professor Theodor Erismann asked his assistant Ivo Kohler to wear a pair of goggles that made him sees the wrong way up. Fascinatingly, Kohler’s brain adapted, and he began to ascertain the planet right side-up through the goggles within a few weeks. The landmark study remains widely referenced today, like within the work Sachse et al. on beholding in 2017.

8.Eyes are crammed with Jelly-Like substance         

80% of the human eye is formed of a firm jelly-like fluid called vitreous humor that's vital to eye health and performance. This clear, colorless substance fills the space between the lenses and therefore, the retina of your eye. Vitreous humor is 99% water, the remainder may be a mixture of collagen, proteins, salts, and sugars. By filling the attention, vitreous humor is important to maintain the eye’s shape and keeping the delicate retina within the place.

9.There are Many Protective Features round the Eye

Our skull and countenance have evolved over many years to guard the delicate eyeball. The socket itself is depressed into the skull, thereby protecting half the attention with bone. Eyebrows are there to catch sweat from the forehead and divert it far away from the eyes. Eyelids on the brink of shield the attention from light and particles when needed. Eyelashes create a filter for dust and other particles, but also act just like the whiskers of a cat or mouse, by sensing when something is on the brink of the attention and triggering the eyelid to shut. The whole length of all the eyelashes shed by a person's in their life is over 98 feet (0.03 km) with each eyelash having a lifetime of about 5 months. Despite these elements, the attention remains one among our most fragile organs, especially within the face of recent hazards like artificial light and industrial substances. Evolution has not trapped with these new hazards, so eye protection is crucial in these modern environments.

10.We All Have a Blind Spot  

We may desire we see everything ahead folks, but we even have a small blind spot. This small portion of the field of vision corresponds to the situation of the blind spot, where the nerves optics exits the attention, and blood vessels enter. Experts are still unsure why we rarely notice this blind spot. One theory is the brain fills within the missing information using visual cues within the environment, the opposite is the overlapping vision of two eyes means they see each other’s blind spots. This simple test can demonstrate your blind spot ! Open this image, then close your left eye and position your open right eye about 8-9 inches from the screen. Check out the cross and slowly move your head forwards and/or backwards until the black circle disappears — when it does it's in your blind spot!

11.Being Nearsighted or Farsighted Depends on the form of Your Eye

Being nearsighted or farsighted depends on the form of the attention. Those with nearsightedness or myopia, the foremost common vision problem, have longer eyes meaning light is concentrated just in need of the retina when looking into the space. For those with farsightedness or hypermetropia, the attention is just to short, meaning the main target point on nearby objects is behind the retina. Both conditions create blurry sight at the respective distance and may be treated with lenses that adjust the position of the main target point.

12.Iris Scans Are safer than Fingerprints

Like a fingerprint, the iris is exclusive to every individual; unlike corresponding fingers on each hand the iris in each of our eyes also was different from each other. Our irises have over 256 unique characteristics, compared that to fingerprints that only have about 40. This makes iris scan for biometric systems far more secured than fingerprints.

13.Red-Eye in Photos is credit to Blood Vessels

Ever wondered why eyes sometimes appear red in photos? The “red-eye” effect occurs when the sunshine of a camera flash or other bright light is reflected at the camera. The reflected light illuminates the blood vessels of the animal tissue at the rear of the attention, which produces the red color you see in photos.

14. Eye Color has Little or No Influence on Vision

It has been suggested that blue and green eyes are more sensitive to light than brown eyes, which brown eyes are more vulnerable to cataracts. Some studies even claim that folks with brown eyes are better at responsive actions like racquet sports, while people with lighter colored eyes could also be better at strategic thinking. Other studies dispute these theories. After numerous studies, theories and old-wives-tales, the sole thing that eye-colour researchers seem to agree on is there's little or no difference between the seeing abilities of individuals with different eye colors. Experts also agree that everybody, no matter eye color, should use tinted glasses to guard their eyes from the sun.

15.You’ll Need Glasses once you grow old

 Around age 40, the overwhelming majority of individuals start to experience a condition called presbyopia. Presbyopia is the hardening of lenses within the eye and makes it harder to specialize in objects that are too close. Presbyopia often intensifies around age 50 because of the lenses still harden with age. As a result, most of the people will need glasses by the time they reach 40 or 50 years old.

The End in view

Better understanding the complex nature of our eyes can help us appreciate how lucky we are to possess them and the way important vision is to the evolution of our species. Understanding our eyes also can help us appreciate how fragile they're, so we'd better protect them from injury and deterioration. To form sure we keep our eyes healthy and safe from harm we must limit their exposure to light, heat and particles like dust, by protecting them with quality glasses, and we will enjoy all the advantages of vision but without the danger.

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