Sorry, didn't see your reply, Prescription degree is an old system, I use it because my parents use it. Though I understand there is a Points system that has a large following, for example, 2.0 vision is un-aided
slimpiggy(瘦猪犹如插翅虎)
eyesight,
(#177963@0) Last Updated: 2001-8-24 This post has been archived. It cannot be replied.