Module 12 

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Module 12:

OVERVIEW

Estimated study time:  One hour.

Program Level: Basic and intermediate.

Target Audience:  OMPs with little or no experience performing visual fields and more experienced OMPs wanting review.

Pre-requisites:  A basic knowledge of the anatomy of the eye.

Date of original release:  April 2002

Section 1:

Description of content:  This section discusses basic concepts associated with visual field testing, such as central and peripheral vision, kinetic and static perimetry, threshold, isopter, scotoma, and the island of vision analogy.

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

• define terminology associated with visual field testing

Section 2:

Description of content:  This section discusses the limits of the normal visual field and how they are measured.  Measuring binocular and monocular field limits for driver's license forms is discussed.  Two methods of confrontation visual field testing are discussed.

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

• give the limits of the normal binocular and monocular visual field

• name effective methods for measuring visual field limits

• list the steps necessary to perform a confrontation visual field test

Section 3:

Description of content:  This section differentiates manual, automated, kinetic, static, screening, and diagnostic perimetry.  Various testing methods are discussed including the tangent screen, the Goldmann perimeter, the Amsler grid, the auto-plot, the arc perimeter, and Harrington-Flocks.  Error sources in visual field testing are discussed.

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

• identify the characteristics of the various visual field testing methods

• list the steps needed to perform kinetic perimetry with the tangent screen

• list the steps needed to perform Amsler grid testing

• identify sources of error in visual field testing

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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