The application is called the “Optical Tool” and is designed to help opticians have quick access to optical information.
Add plus and minus with the tap of the screen
Swipe up or down for base up or base down
Swipe right for base in and left for base out
Quick ANSI reference
The app currently has seven formulas (Back Vertex, Compensated Power, Oblique Meridian, Prentice’s Rule, Resultant Prism, Resolving Prism, Center and Edge Thickness) and includes a reference to the ANSI Standards. In addition to computing the formulas, the app also gives you detailed information about each formula. More features will be added in the near future, so be sure to check for updates.
The application is only $1.99 and is currently available in the Apple applications store. Quickly get the answers to your calculations.