I GOT 50 BACK AFTER LASIK SURGERY FOR 3 MONTHS BECAUSE I GOT VERY LESS OF SLEEPING HOURS WHICH JUST ONLY 3 ~ 5 HOURS PER NIGHT AVERAGELY & I HAVE TO FACE PC FOR WORK ALMOST 10 HOURS PER DAY FROM MONDAY TO FRIDAY. DO NOT FOLLOW ME LIKE THIS UNHEALTHY STYLE !