Prism flippers are available as a stock item in most powers. For powers outside this range, please go to “Custom Prism Flippers”. Our prism flippers are clearly marked with the power and base orientation on permanent washable labels. All prism lenses are chemically hardened glass (plano base curve). The frame has an indicator on each side to show prismatic power and position. The markings indicate the combined powers unless yoked or base up/down.
Example A 4^in/4^out = Top 2^in/2^in Bottom 2^out/2^out
Example B 8^in/12^out = Top 4^in/4^in Bottom 6^out/6^out