The scratches are removed utilizing an eyeglass cleaner, which surprisingly works well with Compact disks.
The final uses the lense giving you the clearest visual acuity. The glasses are measured in 0.25 increments (e.g. +1.00, +1.25, +1.50, etc.). http://WWW.Alltab.Co.kr/bbs/board.php?bo_table=free&wr_id=1893638