Combine horizontal and vertical prism into one oblique prism, or break an oblique prism back into its parts. It's built for prism prescriptions for patients with binocular vision dysfunction or other eye alignment issues.
Prism that works in two directions at once can be written two ways: as separate horizontal and vertical amounts, or as one oblique prism at a base angle. This calculator converts between them.
- Compounding: enter the horizontal (base in or out) and vertical (base up or down) prism. You'll get the single resultant prism and its 360° base angle.
- Resolving: enter one prism power and its base angle. You'll get the horizontal and vertical components.
Use it to verify prism on a lensometer, split prism between the two lenses, or set up a single prism for the lab to surface.
