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One of the things we make sure we get from our diet is Vitamin A because we know that it has to do with keeping our eyes healthy. Not only does this vitamin remove the threat of developing vision problems, but it also plays a direct role in creating the images you see. Without this one thing the human eye is not capable of processing light into concrete and tangible pictures. In addition, getting the right amounts of this vitamin translates to fine-tuning the clearness of human vision.
SOURCE
There are many precursors of vitamin A. Carotenoids, such as beta carotene, are pro-vitamin A that are abundant in plant sources, for example carrots and sweet potatoes. Retinol, the form we get from most animal sources, is the same form of the vitamin present in our body, and thus called pre-formed vitamin A. When the human body digests and absorbs any of these precursors, the liver converts them into many other forms for use by specific body parts. These forms are products of metabolism with some differences in their molecular structures but all collectively known as vitamin A. One form called retinal is delivered to the eyes where it is incorporated into the proteins that make up the retina.
VISION
Whenever we open our eyes the particles of light around us are interpreted by our brain. The cornea, the transparent outermost layer of the human eye, manages the direction and speed of the light coming in together with the lens. The pupil is the opening to the inner part of the eye, and the iris controls the amount of light that enters by changing the size and diameter of the pupil. When the light hits the retina, it is processed by cells capable of absorbing or reflecting each light particle. The images that we see are products of processed light particles.
vitamin A plays a major role in human body so,we should add vitamin A in our daily food.
SOURCE
There are many precursors of vitamin A. Carotenoids, such as beta carotene, are pro-vitamin A that are abundant in plant sources, for example carrots and sweet potatoes. Retinol, the form we get from most animal sources, is the same form of the vitamin present in our body, and thus called pre-formed vitamin A. When the human body digests and absorbs any of these precursors, the liver converts them into many other forms for use by specific body parts. These forms are products of metabolism with some differences in their molecular structures but all collectively known as vitamin A. One form called retinal is delivered to the eyes where it is incorporated into the proteins that make up the retina.
VISION
Whenever we open our eyes the particles of light around us are interpreted by our brain. The cornea, the transparent outermost layer of the human eye, manages the direction and speed of the light coming in together with the lens. The pupil is the opening to the inner part of the eye, and the iris controls the amount of light that enters by changing the size and diameter of the pupil. When the light hits the retina, it is processed by cells capable of absorbing or reflecting each light particle. The images that we see are products of processed light particles.
vitamin A plays a major role in human body so,we should add vitamin A in our daily food.
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