Converting Prism Diopters to Degrees

Prism diopter = 100 * TAN Angle

Or

Angle = ARCTAN (Prism diopter / 100)

Angles are in degrees
Rule-of-thumb for small angles:
- 1 Prism Diopter for every 0.57 Degrees
- 1 Degree for every 1.75 Prism Diopters