I use glasses.
I had them ever since I was in third grade. I need to use them at all times because whenever I take them off, everything looks a little fuzzy.
I had broken my glasses once. I had no idea on how they broke, but they just snapped in half. So, I had to live about three days or so without them. It was hard.
I had gotten a new pair that looked similar to those glasses. A little later, I gotten another new pair (that I'm wearing right now) since the old glasses kept sliding off of my nose.
I still have the old glasses, but I might use it as a spare.