Vertical Prism Imbalance & ANSI

This video explains the process of measuring unwanted vertical imbalance and applying ANSI tolerance to the results in order to determine whether the lens/pair passes or fails. Although this explanation is for single vision lenses, the concepts and processes can be applied to multi-focal lenses as well.

[@carmenmtz4519]

The way you explained was amazing!!! Thank you so much!

[@aprileunaoh4530]

Thank you so much!!!! Amazing

[@allenchungproduction2662]

love this video........u should make more video to educate optician..............

[@MsTracyBennett]

I’m working on it! I teach optics in my full time job but I’m working on adding more videos to their content. Thanks for the encouragement! I’m so glad the videos help you.

[@tuoinguyen9061]

Can you make another video about horizontal imbalance and ANSI?
Thank you so much

[@MsTracyBennett]

I just uploaded one tonight on this. Hope it helps!

[@ItsPainnz]

when u order 2mm drop seg and U receive 7 mm seg drop

[@MsTracyBennett]

I would need more information to help you sort this out. The prism application in this video deals with SV lenses but it's essentially the same procedure when it comes to checking the distance power and unwanted vertical prism in a segmented lens. Essentially, you should be able to perform the measurement of prism error and apply tolerances the same way.