What Is Prism Correction in Eyeglasses?

Prism correction is used in eyeglasses for some people who have diplopia, or double vision. This is when someone sees two separate images of one object. The prism helps align the two images so that only one is the image is seen.
https://www.aao.org/eye-health/glasses-contacts/what-is-prism-correction-in-eyeglasses