Infraergence; Supravergence; Vergence Testing Or Fusion Range Measurement - Near - Ametek Reichert Phoroptor VRx User Manual

Performing an Exam
Prism Testing
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Vergence
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Infravergence and Supravergence can now be measured in each eye.
Infravergence
1. Enter BD prism slowly, until the patient sees two images.
2. Press the CONTROL KNOB, or tap Break.
3. Enter BU prism until the images converge again.
4. Press the CONTROL KNOB, or tap Recover. The amount of Prism at Break and Recovery appears
in the designated boxes on the screen and is saved

Supravergence

1. Enter BU prism slowly, until the patient sees two images. (Please refer to Figures IU-36 & IU-37.)
2. Press the CONTROL KNOB, or tap Break.
3. Enter BD prism until the images converge again.
4. Press the CONTROL KNOB, or tap Recover. The amount of Prism at Break and Recovery appears
in the designated boxes on the screen and is saved.

Vergence Testing or Fusion Range Measurement - Near

Measure vergence for near vision using the following steps:
1. Lower the reading rod to converge the Phoroptor.
2. Press the PRISM button, or tap Prism.
3. Select Vergence in the menu bar at the bottom of the screen.
4. Follow the steps for measuring distance vergence as described in the Vergence Testing or Fusion
Range Measurement - Distance section.
Note: Raising or lowering the reading rod during a vergence test will cancel the current test and start a
new test at the new distance.
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16241-101 Rev. E