Prism is power, measured in diopters, used to correct vision displacement, like double vision or an eye
turn. Most eyeglass prescriptions do not have prism correction. A prescription with prism will have two values
per eye: a Prism (power) and Base (direction). Zenni is able to accommodate prism powers with a range of 0.25
to 5.00 diopters in any direction or combination of directions.