Claims sf> E  
1. A method of measuring centration of a lens, the method comprising: gX}'b\zxC  
placing the lens on a platen, wherein the lens comprises a first major surface and a second major surface, wherein the first major surface is rotationally symmetrical about a first axis, and further wherein the first major surface comprises a first lens centration mark located at the intersection of the first major surface and the first axis, wherein placing the lens on the platen comprises placing the lens on the platen such that the first lens centration mark is aligned with a rotation axis of the platen; dAI^ 霍林郭勒市| 青川县| 房产| 玛多县| 昌乐县| 张北县| 敖汉旗| 开平市| 隆林| 惠州市| 卢氏县| 武隆县| 筠连县| 尚志市| 丽江市| 贵德县| 景泰县| 安徽省| 新沂市| 聂拉木县| 微山县| 当雄县| 利川市| 万年县| 上思县| 綦江县| 萝北县| 留坝县| 镇康县| 牙克石市| 天峻县| 德庆县| 治多县| 舞钢市| 昌黎县| 柳州市| 大庆市| 黄骅市| 盘山县| 高要市| 盈江县|