Your eyes are an important part of your health. Like the rest of your body, your eyes can deteriorate as you get older – but a problem with your eyesight is no small matter. A vast majority in the population wear glasses or contact lenses. For older people, it is extremely rare not to use glasses or contact lenses. According to an estimate, more than 6 in 10 people wear glasses or contact lenses.
On the other hand, many experts think, carrots are very beneficial for your eyes’ health. If you are thinking the same, then don’t miss this episode.
Hello and welcome to another episode of random thoughts.
The question is can you stop wearing your glasses if you eat enough carrots?
Carrots contain beta-carotene, which our bodies convert into a chemical commonly known as vitamin A.
It is necessary for vision. In the cells of our retinas known as rods, there is a pigment called rhodopsin.
When light traverses the eye and hits the retina, it bleaches that pigment. The intensity of the light determines the degree of bleaching, which determines the intensity of the signal transmitted to the brain. ( these rods can be manually stimulated by rubbing our eyes, which causes a sensation of bright spots even while the eyes are closed). The pigment cannot stay bleached, though. The rhodopsin must be quickly recycled, like shaking an Etch A Sketch, so that it can be bleached again. This process requires vitamin A. Without it, the rods will bleach, leading to blindness.
Deficiency of beta-carotene and vitamin A is often referred to as “ night blindness” because the symptoms are first noticed in low-light conditions, but eventually, it leads to total blindness.
But it is not all, dude!
However, having extra vitamin A will not make the pigment recycle faster. Take all the vitamin A you want, drink all the carrot juice at the club, and it still won’t help your vision.
Extra beta-carotene may not improve vision, it can have the effect of turning your eyes and skin yellow.
The office of Dietary Supplements of the National Institutes of Health notes that vitamin A overdose “ is usually a result of consuming too much-preformed vitamin A supplements.” Juices, too, making it easy to get too much beta carotene. Juicing strips vegetables of fiber, removing the mass that fills your stomach and triggers a sense of fullness. Just a half-cup of raw carrots has 184 percent of the daily recommended amount of beta-carotene, a plausibly safe and reasonable dose. After eating that much carrot, most of
we think, “ Okay, that’s plenty of carrots for me.”
A half glass of carrot juice, meanwhile, has many times more bioactive chemicals. Do that regularly, and vitamin A will build up in your skin, causing a yellow hue.
But Beware Buddy! It should be harmless, though long-term intake of high levels of vitamin A has caused fatal liver failure.
When infants are given too much, the pressure inside their heads increases until their intracranial
contents are visibly bulging out of the “soft spots” in their skulls, where the cranium has yet to fuse. (Called fontanelles, from the diminutive of Fontaine, these are little brain fountains.)
All of this excess vitamin A could just as well be going to the kids with night blindness.
So there must be balance and avoid excess as it is said: “Excess of everything is bad.”