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've been wearing glasses since before I began Elementary School. Not sure if wearing them for that long has contributed to my decline in vision, but as it stands I can't read the word SMARTIES on a SMARTIES box that is further than my arm's length away (without squinting). Also, my left eye is noticeably worse than my right :(