Do you know how to read prism of your lenses?

[prescription glasses]

How do you know about the paramaters of your prescription, your doctor may prescribe prism power to help your eyes work more efficiently besides sphere power, cylinder power and axis, prism is added to an eyeglasses lens prescription only if a problem with eye teaming or eye alignment is detected, and prism is measured in special power units called prism diopters, which is usually expressed in fractions! If you need more information of how to read your prescription, you can log onto *************************.net!