3 ms·

Protection over a life time of exposure, whereas if you avoid myopia by age 20 you're probably good for life

• WesolyKubeczek 2y ago
  Didn’t quite work in my case.
  • kyriakos 2y ago
    And you are not alone. I know a lot of people who got myopia after 20.
    • thsksbd 2y ago
      How bad? My college (8 diopters) was jealous of my "mild" 4 diopters of correction.