发明名称 |
A PROGRESSIVE MULTIFOCAL CONTACT LENS SUITABLE FOR COMPENSATING PRESBYOPIA |
摘要 |
The progression of the optical power of the lens comprises a first tract (a) that descends rapidly to the base dioptric power and in which the lens functions for near vision; a short second tract (b) that remains substantially at the level of the base dioptric power and in which the lens functions for far vision; and a third tract (c) consisting of a first progressively rising part (c') and a constant second part (c") and in which the lens functions progressively for intermediate distance in the first part and in a constant manner for near vision in the second part.
|
申请公布号 |
CA2313158(C) |
申请公布日期 |
2007.01.30 |
申请号 |
CA19992313158 |
申请日期 |
1999.02.03 |
申请人 |
EURO LENS TECHNOLOGY S.P.A. |
发明人 |
FILIPPO, ALESSANDRO;ALTIERI, ANDREA |
分类号 |
G02C7/06;G02C7/00;G02C7/04 |
主分类号 |
G02C7/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|