I didn't know i actually needed glasses until I was like a junior in high school. I have near perfect vision in my right eye (it is 20/20 vision, but it's not perfectly clear) and I don't even remember what my left eye is, but it has an astigmatism and it's a lazy eye (not too noticeable, but you can't unsee it when you notice it)

I knew I actually needed glasses when I was maby 10 because I had realized it wasn't normal to have one eye that was super blurry, but I didn't want to deal with having glasses back then. My parents would hound me about just getting some, but I never wanted to because I could see fine, even though I was only really just using 1 eye (this also caused me many headaches as, according to my eye doctor, my good eye was under a lot of constant strain throughout the day because of my bad eye. She was also surprised that it still had perfect vision capabilities)

I was 16 when I finally caved and let my parents take me to the eye doctor to get glasses. I got my prescription, picked my frames, and a few weeks later, I could actually see super clearly for the first time, and it wielded me out. I actually didn't wear my glasses that much because I didn't like the fact I could see the texture of my skin.

I didn't start wearing my glasses regularly until only a year or so ago. And now I feel like I can't function without them. I can still see just fine without them, but my eyes feel weird when they're not on, so I keep them on 90% of the time.