Ametek Reichert Phoroptor VRx User Manual page 87

Instructions for Use
Prism Testing
(continued)
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 touch BREAK.
3. Enter BD prism until the images converge again.
4. Press the CONTROL KNOB, or touch RECOVER. The amount of Prism at Break and Recovery
appears in the designated boxes on the screen and is saved.
16241-101 Rev. D
(continued)
Figure IU-36, Supravergence - Break
Figure IU-37, Supravergence - Recover
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