How Does Vitamin A Help the Eyes?
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Darrell Miller
Apr 1, 2013, 10:10:03 AM4/1/13
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Darrell Miller
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Article Title: How Does Vitamin A Help the Eyes?
Author: Darrell Miller
Word Count: 519
Article URL: http://www.isnare.com/?aid=686537&ca=Wellness%2C+Fitness+and+Diet
Format: 64cpl
Contact The Author: http://www.isnare.com/eta.php?aid=686537
Easy Publish Tool: http://www.isnare.com/html.php?aid=686537
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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.
Sources
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.
Human 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.
Retinal
A process called phototransduction takes place in the nerve cells inside the retina. In well-lit environments with high light levels typical in the morning, neurons called rod cells change light particles into electrical signals delivered to the brain to produce visual representation. At night cone cells take charge of this process since they are more sensitive to light particles. Both neurons consist of proteins that manage the concentrations of retinal, the vitamin A in the retina. By doing so, each particle is either absorbed or reflected to create color at daytime or manage intensity in low-light environments.
Retinoic Acid
Cells called epithelium that protects the eye from the outside environment make up the exposed part of the cornea. Epithelial tissues in the human eye need maintenance to avoid dryness that may give rise to rough dead cells, a major cause of many eye problems including the inability of the eye to produce tears. One form of Vitamin A called retinoic acid nourishes these tissues and its absence results in damages to the epithelium.
Little do we know that Vitamin A plays such a major part in the human body.
About The Author: If you want to support good eye function and health, add vitamin A to your diet risk free at VitaNet �, LLC Vitamin Store. http://vitanetonline.com/ Get More Unique content like this: http://vitanetonline.com/articlerequest.cfm
Please use the HTML version of this article at:
http://www.isnare.com/html.php?aid=686537
*********************** ARTICLE END ***********************
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Message delivered directly to members of the group:
publish-the...@googlegroups.com
*****************************************************************
Please consider this free-reprint article written by:
Darrell Miller
*****************************
IMPORTANT - Publication/Reprint Terms
- You have permission to publish this article electronically in free-only publications such as a website or an ezine as long as the bylines are included.
- You are not allowed to use this article for commercial purposes. The article should only be reprinted in a publicly accessible website and not in a members-only commercial site.
- You are not allowed to post/reprint this article in any sites/publications that contains or supports hate, violence, porn and warez or any indecent and illegal sites/publications.
- You are not allowed to use this article in UCE (Unsolicited Commercial Email) or SPAM. This article MUST be distributed in an opt-in email list only.
- If you distribute this article in an ezine or newsletter, we ask that you send a copy of the newsletter or ezine that contains the article to http://www.isnare.com/eta.php?aid=686537
- If you post this article in a website/forum/blog, ALL links MUST be set to hyperlinks and we ask that you send a copy of the URL where the article is posted to http://www.isnare.com/eta.php?aid=686537
- We request that you ask permission from the author if you want to publish this article in print.
The role of iSnare.com is only to distribute this article as part of its Article Distribution feature ( http://www.isnare.com/distribution.php ). iSnare.com does NOT own this article, please respect the author's copyright and this publication/reprint terms. If you do not agree to any of these terms, please do not reprint or publish this article.
*****************************
Article Title: How Does Vitamin A Help the Eyes?
Author: Darrell Miller
Word Count: 519
Article URL: http://www.isnare.com/?aid=686537&ca=Wellness%2C+Fitness+and+Diet
Format: 64cpl
Contact The Author: http://www.isnare.com/eta.php?aid=686537
Easy Publish Tool: http://www.isnare.com/html.php?aid=686537
*********************** ARTICLE START ***********************
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.
Sources
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.
Human 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.
Retinal
A process called phototransduction takes place in the nerve cells inside the retina. In well-lit environments with high light levels typical in the morning, neurons called rod cells change light particles into electrical signals delivered to the brain to produce visual representation. At night cone cells take charge of this process since they are more sensitive to light particles. Both neurons consist of proteins that manage the concentrations of retinal, the vitamin A in the retina. By doing so, each particle is either absorbed or reflected to create color at daytime or manage intensity in low-light environments.
Retinoic Acid
Cells called epithelium that protects the eye from the outside environment make up the exposed part of the cornea. Epithelial tissues in the human eye need maintenance to avoid dryness that may give rise to rough dead cells, a major cause of many eye problems including the inability of the eye to produce tears. One form of Vitamin A called retinoic acid nourishes these tissues and its absence results in damages to the epithelium.
Little do we know that Vitamin A plays such a major part in the human body.
About The Author: If you want to support good eye function and health, add vitamin A to your diet risk free at VitaNet �, LLC Vitamin Store. http://vitanetonline.com/ Get More Unique content like this: http://vitanetonline.com/articlerequest.cfm
Please use the HTML version of this article at:
http://www.isnare.com/html.php?aid=686537
*********************** ARTICLE END ***********************
- To distribute your articles go to http://www.isnare.com/distribution.php
- For more free-reprint articles go to http://www.isnare.com
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