Module 46

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Module 46:

Refractometry, Basic Techniques

OVERVIEW

Estimated study time:  One hour.

Program Level:  Basic

Target Audience:  OMPs wanting to learn refractometry or review for the certification exam.

Pre-requisites:  Knowledge of basic optics is helpful.

Date of original release:  March 7, 2008

Description of content:   

This module discusses the four steps in the basic refractometric process: initial sphere power testing, cylinder axis testing, cylinder power testing, and sphere power refinement.

Instructional  objectives:  Upon completion of  this section,  the student should be able to:

• list advantages and disadvantages of retinoscopy, the auto-refractor, the old glasses prescription, and keratometry as starting points for refractometry

• demonstrate the ability to convert K readings into cylinder axis and power

• discuss how to set up the phoropter for refractometry

• list the standard order of testing for refractometry

• identify correct procedures used in the refractometric process

About the Author: 

Gary Gallimore is a certified ophthalmic technologist who assists with research at the Eye Foundation of Kansas City and works for a large multi-specialty ophthalmology practice in the metro area of Kansas City.   He has taught CE courses for many years on all subjects of ophthalmic technology. 

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