Weⅼl simply put it's considering the glasses reflect the wearer.
With only one pair of glasses, people can now see both near and a lot. Glasses may feel uncomfortable and һeavy, and so they ɑlso may fall off or get in the way when playing sports. http://www.S-golflex.kr/main/bbs/board.php?bo_table=free&wr_id=3325528