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When your vision isn't perfect.
AnswerWhen you need them to see clearly, or you can wear clear glasses for eye protection. So you might need sunglasses if the light is too bright, or magnifying glasses if something is too small to see clearly. If your vision is not clear, you may need to wear reading glasses or driving glasses.
Wiki User
∙ 14y ago
Wiki User
∙ 16y agoWhenever you have a blurry vision combined with headaches, you go to the opthalmologist. And depending on his diagnosis, you'll be told whether to use glasses or not.
Four typical cases in which glasses are used to adjust your vision:
- Myopia (short-sightedness)
- Hyperopia (long-sightedness)
- Presbyopia; resulting from old age (failure of the lens to focus on close objects)
- Astigmatism; due to irregular cornea shape
Wiki User
∙ 11y agoit depends. if you are in middle school or high school, you probably dont want to. if your in elementary, that is ok.
Wiki User
∙ 11y agoBecause some people are blind and they can't see without glasses.
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