| 摘要 |
An ophthalmic lens includes an optic having an anterior surface and a posterior surface. The lens also includes a monofocal diffractive structure disposed on one of said surfaces for providing a diffractive focusing power. The lens further includes at least one multifocal diffractive structure disposed on one of said surfaces for providing a plurality of diffractive focusing powers. The multifocal diffractive structure is adapted to provide chromatic aberration compensation for near vision. |
