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 The Goldman VF is a manual perimeter.  The Goldmann perimeter is capable of both static and kinetic perimetry.  Isopters are used to show VF areas.

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Presentation on theme: " The Goldman VF is a manual perimeter.  The Goldmann perimeter is capable of both static and kinetic perimetry.  Isopters are used to show VF areas."— Presentation transcript:

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2  The Goldman VF is a manual perimeter.  The Goldmann perimeter is capable of both static and kinetic perimetry.  Isopters are used to show VF areas of equal or greater sensitivity.  Each isopter represents a different stimulus size that was presented to the patient and is marked by the tech to show the boundaries of the stimulus size.

3  Apostilbs (Asb)  An expression of light intensity used while performing the Goldmann perimeter.  Basically- How bright the stimulus (light) is!  The higher the number, the brighter the stimulus (light).  Decibels (dB)  An expression of light intensity used while performing a computerized VF.  The smaller the number, the brighter the target is.

4  Brightness of stimulus controlled by numeric lever.  0,1,2,3,4.  0 is dimmest  4 is brightest  Brightness of stimulus also controlled by alphabetic lever.  a,b,c,d,e.  a is dimmest  e is brightest

5 Stimulus Size  You can also change the size of the stimulus. There are 6 sizes.  0 I II III IV V  “O” is the smallest size and is rarely used.  “ V “ is the largest size and can be used for patient’s with very limited VA.  The size of the stimulus is measured in mm.  1/64mm, ¼mm, 1mm, 4mm, 16mm, and 64mm.  Changing the stimulus size lever 1 position makes the stimulus 4 times larger.

6  Fixation must be monitored.  Selection of stimulus size, intensity and brightness.  Moving the stimulus (manually).  Recording the patient responses and labeling all isopters with color coding or Stimulus size and brightness.  Example V 4 e or I 2 e  largest smallest

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12  It is very important to explain what the patient should expect.  Make it clear the test will not be accurate if the patient does not look at the fixation target at all times. If they do deviate, redirect them.  Explain why you are doing the test.  Explain where the “lights” will be and to press down and release the button every time they see a light.  Let them know how small the “lights” will be.  Remember- You are the technician, it is your responsibility to inform the patient so an accurate test can be performed while the patient feels comfortable enough to do it!!!

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23  Static and kinetic testing  Change the size and intensity during the test according to patient responses.  You are moving the target according to the patient’s responses.  More skill and practice are needed to perform an accurate test within a reasonable amount of time.

24 Now try to perform a Goldmann field on your classmates!


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