能看懂不？

Here are two examples of what prescriptions for eyeswith astigmatism could look like:

-2.00 +1.50 x 180

+3.50 +3.00 x 45

The first prescription means that the person has 2 diopters of nearsightedness with 1.5 diopters of astigmatism and an axis of 180 degrees.

The second prescription means that the person has 3.5 diopters of farsightedness, 3 diopters of astigmatism and an axis of 45 degrees.

所有跟帖： 

• 我猜第一个数字是度数，第二个是散光+加偏转角度 -缘去缘来- ♂ (0 bytes) () 12/14/2016 postreply 12:13:16

• 你儿子俩散光轴度相差很大啊，一个10度，一个170度。。。 -教导l- ♂ (278 bytes) () 12/14/2016 postreply 12:34:36

• 再点上贴看度娘 -教导l- ♂ (0 bytes) () 12/14/2016 postreply 12:37:16

• 问又帅 -教导l- ♂ (0 bytes) () 12/14/2016 postreply 12:40:32

• 只差5度。 -又当爹来又当妈- ♀ (226 bytes) () 12/14/2016 postreply 12:38:29

• 是奥，一个往左偏10度，一个偏170，其实就是往右偏10度？ -教导l- ♂ (0 bytes) () 12/14/2016 postreply 12:40:21

• 哈哈 -mama2011- ♀ (169 bytes) () 12/14/2016 postreply 13:14:51

• 散光在180°左右是WITH THE RULE, 绝大多是人有轻度散光，是轴向180左右，这个180是镜片轴向，无需弄太明白 -mama2011- ♀ (0 bytes) () 12/14/2016 postreply 13:19:45

• it is wong, who explained this? it is plus cyl not minus, differ -mama2011- ♀ (0 bytes) () 12/14/2016 postreply 14:03:19

• differnent story -mama2011- ♀ (169 bytes) () 12/14/2016 postreply 14:03:54