Sphere (SPH): the amount of long (+) or short (-) sight your eye has. The farther the number away from 0.00, the stronger and thinner then prescription lens required. 就是俗曾的近视度数,分远视和近视,一般会在Prescription上写清楚。度数越高,对镜片的要求越高,如果是600度以上的话,最少要配1.61的镜片,如果去店里配的话,一般1.61的镜片在大概价格在50-80镑左右。
Cylinder (CYL): the amount of astigmatism, or visual distortion, caused by an irregularly shaped cornea. 所谓的散光度数,度数如果高于+2.00或者-2.00的话,一般是要另外收钱的。一般多收10-30镑