Teachable Tuesday – How To Calculate Prism

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John Seegers and Laramy-K, have graciously shared some of their awesome videos with us to share with you. John has been training opticians for quite some time and his video series have received acclaim from coast to coast, helping opticians pass certification and licensing exams.

This week’s video is about How To Calculate Prism

For more information, visit Laramy-K.

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