Prism Applications A to Z

Prism Applications A to Z

September 28, 2018, 2:45 PM - 4:45 PM

Sands Convention Center - 1003-V

The effects of prism seem to be a source of confusion for many eye care personnel. In some practices, unwanted, unneeded prism is a frequent source of patient dissatisfaction and complaints when prism exists in a pair of eyeglasses and has not been prescribed. The potential for prism-related problems needs to be considered with every patient, especially those that we want to fit with progressive or other multifocal lenses. This course is designed to provide an overview of prism, its optical effects and the symptoms described by patients experiencing prism problems. It will provide an overview of prismatic effect, how to calculate prism, understanding base direction, how prism is used to achieve binocular vision and how errors in the placement of lens optical centers may result in prism and potentially a loss of binocular vision.


  • Phernell Walker



    Pure Optics

    Mr. Walker is an internationally recognized educator and author of the text-book Pure Optics. He is a Master in Ophthalmic Optics, earned an MBA from...

Type of Session

  1. Type of Session Course


  1. A - ABO Yes
  2. C - COPE No
  3. FL-OD - Florida State Board of Optometry No
  4. FL-OP - Florida State Board of Opticianry No
  5. FL-T - Florida State Board of Opticianry – Technical Yes
  6. N - NCLE No
  7. NYS-CL-A - New York State Opticians - Contact Lenses - Advanced No
  8. NYS-CL-B - New York State Opticians - Contact Lenses - Basic No
  9. NYS-CL-I - New York State Opticians-Contact Lenses-Intermediate No
  10. NYS-D-A - New York State Opticians-Dispensing-Advanced No
  11. NYS-D-B - New York State Opticians-Dispensing-Basic No
  12. NYS-D-I - New York State Opticians-Dispensing-Intermediate Yes
  13. O - Orals No
  14. P - AOA Paraoptometric Commission No
  15. T - TQ-CEE No
  16. TPA - Therapeutic No


  1. Track
    OptiCon - Spectacle


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