Structurally and functionally, the human eyes are a very complicated and interesting organ. Humans can see any image captured by their eyes after processing it in the brain.
People think that they are capable of seeing anything in the world with their eyes, which is a partial truth. The eyes capture the image and send the signal to the human brain via the optic nerve, after processing, you are able to visualize the object. There are numerous such facts about the human eyes. Go through this article to know about them.
You only see a very small portion of your eyeball from outside:
Can you guess how many portions of your eyeball are visible from the outside? it's only 1/6th portion. The human eyeball is a big and complicated structure.
The human eye is the second most complex organ after the human brain:
The human brain is the most complex organ with intricately placed nerves and other structures. The second one is the human eye. Let me share another trivia about the functionality of the human brain and eye. Around 60% of the human brain area is dedicated to image processing. So, a major portion of your brain is associated with vision.
The functional diversity of human vision:
Your eyes can focus on at least 50 separate objects per second. Also, human eyes can distinguish around 10 million separate colors. Yes, the efficiency of the human eye and nerves is so high.
The distant vision of human eyes:
Human eyes detect the flame of a candle from a very large distance (around 1.7 miles). You can observe this capability of your eyes while roaming around a beach inthe evening. You can observe some light or candle located far above.
Blinking of eyes:
Generally, humans blink at least 12 times per 60 seconds, so one blink per 5 seconds. Yes, you just blinked while reading the sentence. So, how many times do you blink in a year? It's approximately 4,200,000 times.
The human eye is nothing but a camera:
Yes, you read it right. Human eyes only act as a camera with 576 megapixels. The eye is required to capture the image only. The processing and understanding of the image are done by your brain cells. Just like a camera, light enters through the pupil in the human eyes. So, the pupil is functionally equivalent to the aperture. The amount of incoming light is also regulated in both camera and the human eye. Thus, the iris and diaphragm of the camera are functionally similar. Both camera and human eyes contain a lens. Also, the reflection of light is regulated in both eyes and camera. Functionally, the retina of the human eyes is similar to the film of a camera.
Human eyes and tears:
When you cry, tears come out of the lacrymal gland. But, you will see no tears from a newborn baby as they cannot produce tears. It takes at least 6-7 weeks to develop the lacrymal gland for tear production. Also, at your older stage, the crying becomes drier due to a lack of secretion from the lacrymal gland.
