EZER EDR 9000, Operation Manual

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100
Operation
Operation
Manual
Manual
10.24
Ve rtic a l Vo n Gra e fe Te s t
! Purpose: Subjective test, process Heterophoria in a way of Von Graefe.
!
Chart: Numbers Chart
! Auxiliary Lens: Rotating Prism for right eye, and 10
△
BI Prism for left eye
! Target: Be the state in which the left horizontal line and the right horizontal line are arranged on
one straight line in the middle.
! Way of Test
1. Press [TEST] button of touch screen and choose [VON GRAFE VERT.] to process
this test.
2. Ask the patient if the vertical bars are located on one straight line.
▶
“Yes,” no Heterophoria. Test done.
▶ “
No,
”
it
’
s Heterophoria. Process the next test.
3. Of 2 of vertical bar, which bar is the upside.
▶ In case of right bar on downside: Turn the “R.Hyperphoria” dial counter clockwise to
add BD prism, until the 2 horizontal bars are arranged on one straight line.
▶
In case of left bar on downside: Turn the
“
L.Hyperphoria
”
dial clockwise to add BU
prism, until the 2 horizontal bars are arranged on one straight line.
4. When the test is over, press [OK] button to save the result, or press [X] button to not
save result.
[Figure 10-24] Vertical Von Graefe Test
10.25 Min ute S te re o Ac uity Te s t
! Purpose: Subjective test, progress a minute stereo Acuity test.