Ametek Reichert Phoroptor VRx User Manual page 86

Instructions for Use
Prism Testing
(continued)
Infravergence and Supravergence can now be measured in each eye.
Infravergence
1. Enter BD prism slowly, until the patient sees two images.
(Please refer to Figures IU-34 & IU-35.)
2. Press the CONTROL KNOB, or touch BREAK.
3. Enter BU 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.
86
(continued)
Figure IU-34, Infravergence - Break
Figure IU-35, Infravergence - Recover
16241-101 Rev. D