Our eyes are the most sensitive part of our body, and the most useful one. Everyday, we use our sense of sight for writing, reading, and everything else, but have you ever wondered how our eyes can see? Well, others probably have not, but I believe that most of the people have thought about that already. Today, I’m going to tackle about how our eyes, see.
The human eye is made up of different parts. The major parts are the cornea, iris, lens, and retina. These parts work all together so that we can see. The images we see are made up of light reflected from the objects we look at. Pretty interesting right? Now, let’s first tackle about the outer part of our eye, the cornea. The cornea is the dome-shaped window covering the front of the eye. There are no blood vessels in the cornea, but it is very sensitive. The colored part of the eye is the Iris, it helps regulate the amount of light that can enter our eye. The next part is the lens, the transparent structure inside the eye that focuses light rays onto the Retina. The lens and cornea comprise the optical system. Would you believe that they are similar in function to the lens of the camera? Well, you better do!
From the optical system, we will already go to the next part, the retina. The retina is the nerve layer that lines the back of the eye. It contains approximately 6 million cones, and 125 million rods. The cones and rods are the two types of photoreceptors of the retina. The cone cells are responsible for daylight vision. They allow us to identify colors. The rods, on the other side, are responsible for night vision. They are sensitive to light. Once the focusing of the image in the retina is done, your eyes use special nerves to send the information to your brain, through the optic nerve. Upon receiving the information, the brain processes the information, and then recognizes it.
Now, I bet you already know how amazing our eyes are. You better take care of it so that you won’t regret it later.
