我張眼鏡Record打左D咁既野:
.....................................SPH.........CYL.........AXIS......ADD......P.D.
Full..................R..........-50...........-50...........180..........+
Correction.......L.........+325..........-150.........175..........+
.......................R..........-050..........-025.........180..........+.............57 -
Adjusted.........L..........+300.........-125.........175..........+
大約係咁..即係點解?(D正負係咩?