• Percival / Sheard’s / 1:1 Rule for Prism

    November 10, 2011 | POSTED BY | Clinical Pearls

    When Rxing prism for your patients, don't just pick an arbitrary value! Use one of these criteria. Sheard's Best for EXO patients The fusional reserve must be at least 2 times the demand Prism Needed = 2/3(Demand) -...

  • Transitions VS SunSensors

    July 12, 2011 | POSTED BY | Clinical Pearls

    Transitions: - material tends to be soft -> good for drilling - tint tends to be lighter that SunSensors indoors (~7%) - UV detecting tint is imbibed outside -> lasts about 2 years SunSensors: - softer material than...

  • Adjusting Multifocal Glasses

    July 6, 2011 | POSTED BY | Clinical Pearls

    Properly adjusting bifocals, trifocals, and progressive lenses is often an easy fix for many confusing patient vision problems. Bifocals should be fitted so the top line of the near segment rests at the lower eyelid margin. Trifocals...