I am a teenager and I still have perfect 20/20 vision. Now, I'm not expecting this to last, so I have a question.
How do you know when you need glasses? Do you just wake up one day, and your vision is blurry?
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I have "Lazy eye", which has absolutely horrible vision, even glasses can't help. My other eye is decent but not perfect, I wear glasses at college sometimes, but not on a regular basis.