Parents have lots of tricks to get their kids to eat their vegies. One often-used persuasive tale is that if they don't eat their carrots, they'll go blind, or at the very least, not be able to see in the dark.

But there is a little amount of truth hidden inside the statement. Actually carrots help you in your vision because of vitamin A present inside it.

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If you don't have enough Vitamin A, you won't have healthy skin, a healthy immune system - and good vision. The Vitamin A travels in the blood to the retina (in the eye) where it is converted into a chemical called "retinal". When light hits this retinal chemical, it changes shape. This starts off a process, which ends with electricity travelling to the visual centres at the back of the brain - which turn the electricity into the wall-to-wall sensation that we call vision. No Vitamin A means no retinal in your retina, which means no electrical signals travelling to your visual centres.

So, if you don't get enough carotenes or Vitamin A in your diet, eventually you will suffer problems in your vision.
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http://www.abc.net.au/science/articles/2005/10/26/1392430.htm

Therefore there will be no improvement in your vision by eating carrots unless you already have some problems in your eyes due to vitamin A deficiency. But definitely carrots won't help you in your night vision.

Hope this makes a clear idea to you. If you are still unclear, refer the sources below.
Source(s):
http://www.abc.net.au/science/articles/2005/10/26/1392430.htm
http://health.ninemsn.com.au/whatsgoodforyou/theshow/694318/can-eating-carr...

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carrots really do give your eyes a boost because they contain beta-carotene, which the body is able to convert into vitamin A, an essential vitamin for healthy vision.
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The short answer to this question is the vitamin Beta Carotene. In fact our bodies convert Beta Carotene to Vitamin A when consumed and if our bodies are in fact lacking Vitamin A it can cause a rare condition called "Night Blindness". Read through the attached article.. interesting stuff.
Source(s):
http://www.diet-and-health.net/Nutrients/BetaCarotene.html

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