Close on your "parents tell you lies to make you do what they want" list, but I believe you're slightly incorrect on one point. From allaboutvision.com: "...one average-sized carrot contains twice the U.S. Recommended Daily Allowance (RDA) of vitamin A, which happens to be very good for your eyes." They continue, "If you don't like carrots, don't worry - lots of yummy (and some not-so-yummy) foods contain vitamin A and other nutrients your eyes need." So although many other things can provide the same benifits carrots provide, they do provide Vitamin A which is very important for vison, especially night vision (it has to do with the production of rhodopsin which is what allows to you see at night.
Sorry for being all nitpicky and unecessary, but I wanted to share one of the many facts I learned in a psychology class.
- Pretty good night vision (with my contacts in), but unfortunatly half deaf.