There are always lots of strange stories about protecting your eyes. For example, you might have been told that you'd go blind from reading in the dark, but you could make up(弥补) for it by eating carrots. This is just one of the wrong ideas you may have heard of. A magazine has picked out scientific explanations(解释) for three mistakes the people often make about the eyes. Let's take a look.
Can eating carrots make your eyesight better?
Carrots are rich in vitamin A, which is important and necessary for your eyes' general health. Vitamin A helps eyes to make light into signals(信号) , allowing people to see in low light conditions. However, eating more carrots doesn't help you see better.
If your parents have bad eyesight, will you have bad eyesight, too?
Myopia(近视) can be passed from parents to children. A study by the American Optometric Association found that if both parents are myopia, there is a 33 to 60 percent chance that the child is. For children who have one parent with myopia, the chance is 23 to 40 percent, and it's down to 6 to 15 percent for kids with non-myopia parents. So no matter how bad your parents' eyesight is, you should protect your eyes.
Is it true that people who are color blind can't see colors?
Color blindness doesn't mean that someone can't see colors at all, like a black and white movie. It means that someone has difficulty telling some colors apart(分开), usually green and red or blue and yellow. Color blindness is usually a condition caused by not having color cells(细胞). If the cells don't respond in the right way to differences in-wavelengths(波长) of light, color blindness happens. There are different levels of color blindness.
