| 发明名称 |
PROGRESSIVE ADDITION LENS AND METHOD FOR DESIGNING PROGRESSIVE ADDITION LENS |
| 摘要 |
There is provided a progressive addition lens, including: a distance portion and a near portion; an object side surface including a first toric surface element; and an eyeball side surface including a second toric surface element that cancels the first toric surface element, wherein the first toric surface element is the element in which a vertical surface power OVPf1 at a distance reference point which is previously defined in the distance portion on the object side surface, is larger than a horizontal surface power OHPf1 at the distance reference point, and OVPf1 is not less than a vertical surface power OVPn1 at a near reference point which is previously defined in the near potion on the object side surface. |
| 申请公布号 |
US2015055083(A1) |
申请公布日期 |
2015.02.26 |
| 申请号 |
US201314390942 |
申请日期 |
2013.04.05 |
| 申请人 |
HOYA LENS MANUFACTURING PHILIPPINES INC. |
发明人 |
Mori Takateru;Shinohara Toshihide;Kaga Tadashi |
| 分类号 |
G02C7/06;G02C7/02 |
主分类号 |
G02C7/06 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A progressive addition lens, comprising:
a distance portion and a near portion; an object side surface including a first toric surface element; and an eyeball side surface including a second toric surface element that cancels the first toric surface element, wherein the first toric surface element is the element in which a vertical surface power OVPf1 at a distance reference point which is previously defined in the distance portion on the object side surface, is larger than a horizontal surface power OHPf1 at the distance reference point, and OVPf1 is larger than a vertical surface power OVPn1 at a near reference point which is previously defined in the near potion on the object side surface. |
| 地址 |
Cavite PH |
