The 1,2, 3 of Prism

By

Here's some basics about prism in lenses

1. Eyewear with prism, means that the optical centers of the lenses do not occur at the PD. For example, if the left eye has 2 prism diopters Base Out prescribed, the point on the lens that is 2 Base Out is located at the PD.

You must sign in to see the full article.