Potec PDR-7000 - Phoria Test

PDR-7000 Operation Manual
4.5.3 Phoria test
Use: To detect exophoria, esophoria, hypophoria, and hyperphoria
Chart: Phoria
Auxiliary lens: Right eye 135°, left eye 45°, polarizing filters, binocular rotary prism
Ideal appearance
(PACP-7000, PACP-7000L, PLC-7000pola, PLC-7100pola, PLC-8000pola)
Right eye Left eye Binocular ideal
(Orthophoria)
[Procedure example]
1. Present the phoria chart.
Press
The polarizing filters are placed in the measuring windows.
The base in/out prism powers can be entered.
When is pressed again, the base up/down prism powers can be entered.
2. Ask the patient, “Can you see the four bars?”
Yes  Go to the next step.
No  Impossible to continue the test.
3. Ask the patient, “Do the vertical and horizontal bars form a cross?”
Yes  Orthophoria
No  Heterophoria - Go to the next step.
4. Ask the patient, “Do the vertical bars line up?”
Yes  No esophoria nor exophoria
No  Esophoria or exophoria
5. Ask the patient, “Is the top bar shifted to the left or right?”
Right  Esophoria
Left  Exophoria
6. Ask the patient, “Do the horizontal bars line up?”
Yes  No hyperphoria nor hypophoria
No  Hyperphoria nor hypophoria
NOTE
The rotary prism lenses are removed from the measuring windows when the already
selected button is pressed again in prism mode.
Ex. When is pressed in the base in/out prism, the rotary prism lenses are removed.
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