Book 2, Question 75
Why Do Some People Need Glasses?
Some people need glasses because the picture in their eye does not land in the right spot. Glasses bend the light before it enters the eye. So the picture lands just right, and everything looks clear.
From the book
Page from A Million Whys Book 2
More fun facts
- To see clearly, your eye must bend light so the picture lands sharply on the retina at the back of the eye.
- Glasses and contact lenses are called corrective lenses.
- Nearsightedness has a science name: myopia.
- Most cases of myopia are mild and easy to fix with glasses.
- Some kids are very farsighted and need glasses too.
- Eyeglasses are one of the most common medical devices people use.
Sources: KidsHealth (Nemours), Cleveland Clinic, Cleveland Clinic
Questions kids ask
How do glasses help you see?
They help the eye focus light on the right spot on the retina, the spot that makes the clearest picture.