Why do the people need to wear glasses?
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Many children need to wear glasses due to Myopia (short sighted) or hyperopia (long sighted) which causes focusing problems.
I have been wearing glasses since I was a child, not because I wanted too, but I had to. My vision was not good, causing problems with learning to read etc, further impacted by the fact I also had dyslexia.
I have myopia and astigmatism (one eye only) which causes the surface of the cornea to be curved shape. Which causes distortion of images etc.
uhhh.maybe cuz they can't see without them?
what people
So they can see better. Without glasses there would be a lot more accidents from people driving who can't see.
because the people cant see without them and its suppose to help correct their vision
its called vision impairment. duhhhhhh
Every lens has a focal length, the distance behind the lens where the picture focuses. You can see this if you've ever focussed a light on your desk with a magnifying glass. If you hold the glass just the right distance off the surface of your desk you can see an image of the light.
The lens in our eyes has a focal length that's supposed to focus on the retina in the back of the eye. But sometimes the eyeball is too long or too short, so the lens has trouble focussing. We have muscles to focus the lens, and we use those for looking at things close up or far away. The muscles can compensate for a small difference but for a larger difference it helps to have another lens in front of the eye. Nearsighted people have eyeballs that are too long and farsighted people have eyeballs that are too short.
When we get older the muscles that focus the lenses in our eyes get weaker and we have trouble focussing up close. This happens to everyone at about 40 years of age. It's called presbyopia. After that we need glasses to read, and for the computer. So if you don't need glasses now, you will someday.
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