Digital Refractor CDR-9000 171
1. Press the Von Graefe Chart to enter the horizontal phoria mode. Alternatel
y, press the [TEST] button and then select “ Hor. Von Graefe ” Item of the
touch screen to execute this test.
2. Ask the patient as follows; “Are the two vertical rods vertically aligned?”
3. If “Yes”, finish this test since the patient has no phoria. If “NO”, continue t
his test since the patient has phoria.
4. Ask the patient as follows; “Which one is on the left among the two verti
cal rods?”
5. If “The upper one”, Esophoria. Turn the dial clockwise to add the BO pris
m till the two rods are vertically aligned.
6. If “The lower one”, Exophoria. Turn the dial counterclockwise to add the BI
prism till the two rods are vertically aligned.
7. After finishing this test, press the [OK] button of the touch screen to save
(each results of phoria tests is maintained separately) or the [CANCEL] bu
tton of the touch screen to discard the result.
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