| 摘要 |
PROBLEM TO BE SOLVED: To provide a contact lens of a new structure that allows areas for different dioptric powers to exhibit corrective effects in a more effective way. SOLUTION: A first stable condition in which the center 30 of a second dioptric power area 24 is biased relative to the geometrical center 20 of an optical unit 14 on a symmetry meridian 22 and in which the center 30 of the second dioptric power area 24 is positioned on the side of either a right or left wearing eye and a second stable condition in which the center 30 is positioned on the other side can be selectively set by circumferential positioning means 40, 40. Also, a visible index mark 42 is provided which allows identification of lens directions in which the first and second stable conditions are achieved. COPYRIGHT: (C)2009,JPO&INPIT |
