Automated Prism Test - Phorias, Vergences; Phoria Testing - Distance - Ametek Reichert Phoroptor VRx User Manual

Instructions for Use
Prism Testing
(continued)

Automated Prism Test - Phorias, Vergences

When you activate the Prism function, two different automated test options appear at the bottom of the
screen: Phoria and Vergence.
• Touch PHORIA to sequence through a series of automated steps for measuring Phorias at
distance or near.
• Touch VERGENCE to activate an automated test to measure vergence at distance or near.

Phoria Testing - Distance

1. Press the PRISM button, or touch PRISM.
2. Touch PHORIA in the menu bar at the bottom of the screen.
Note: The Phoria test automatically places Prism power of 6 D BD in the right eye and 10 D BI
in the left eye.
Adjust Initial Prism Values
1. If the default base prism values are not a good starting point for a particular patient, press the
ADJUST INITIAL VALUES button to modify them.
2. Turn the CONTROL KNOB to adjust the value for the selected Phoria base.
3. Press the CONTROL KNOB to switch to the opposite base value.
4. After the desired base values are set, press the SAVE button or the ENTER key to save the
values and return to the Phoria test.
5. Press CANCEL to discard the modified base values and return to the Phoria test.
Note: The base values are only set for the current exam. They will return to the original default
values when a new exam is started.
16241-101 Rev. D
(continued)
Figure IU-27, Horizontal Phoria Test Screen
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