Module 4 
 

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Module 4:

 Accommodation and Near Vision   
 

 
 

OVERVIEW
 

 
 

Estimated study time:  3/4 hour.

Target Audience:  This module is appropriate for assistant,  technician, and technologist level personnel with refractometry experience.

 

Pre-requisites:  Refractometry experience

 

Date of original release:  February 2000
 

 
 

Section 1:

 Controlling Accommodation 
   
 

Description of content:  This section discusses how accommodation can adversely affect the refractometric process.  Methods used to control accommodation are covered.

 

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

 

  • identify which patients would benefit from accommodation control during refractometry

  • discuss undesirable outcomes of uncontrolled accommodation during refractometry

  • name methods that can be used to control accommodation

  • identify cycloplegic drugs

  • describe the fogging procedure 
   
 

Section 2:

 Near Add Determination
   
 

Description of content:  This section discusses factors affecting reading ability and describes a method for determining the proper add power for a particular patient.

 

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

 

  • identify factors affecting a person's ability to read

  • choose the expected add power for a given age

  • describe the process for determining the proper add power

  • discuss the effect of different lens designs on reading ability

 

   
 

Section 3:

 Intermediate Vision Lenses
   
 

Description of content:  This section discusses how  to measure the add power for intermediate vision lenses.   Different types of glasses corrections are reviewed and examples of intermediate vision prescriptions are given. 

 

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

 

  • name the standard calculation factor for the middle seg of a trifocal

  • describe the process for determining the proper power for an intermediate vision lens

  • calculate the power of an intermediate vision lens

  • discuss what types of lenses are useful for an intermediate vision correction
   
 

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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