EZER EDR 9000, Руководство по эксплуатации

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10.21 P ho ria Te s t w itho ut Fixa tio n
! Purpose: In subjective test, progress Heterophoria test in a way of Pola Cross without
Fixation.
! Chart: Polarized Cross Chart without Fixation
! Auxiliary Lens: Polarized Filter with 135 degrees for right eye, and 45 degrees for left eye.
!
Target: The vertical seen with the right eye and the horizon seen with the left eye are united
and seen as cross.
! Way of Test
1. On Special Chart clause of touch screen,
enter Heterophoria Mode by pressing Pola
Cross Chart without Fixation.
2.
Ask the patient, “Does it seem like a cross?”
▶
If the answer is “Yes”, there is no Heterophoria. Test done.
▶ If the answer is “No”, it is Heterophoria. Process the next test.
3. To
start with Horizontal Heterophoria test, ask the patient as following.
4.
“Does the letter ( ) locate on the left side of the letter ( ), or the right side of it?”
▶ Located on left: “ Exophoria.” Turn the dial counterclockwise to increase BI prism, until the
cross is seen well.
▶
Located on right: “Esophoria.” Turn the dial clockwise to increase BO prism, until the cross is
seen well.
5. To
start with Vertical Heterophoria, ask the patient as following.
6.
“Does the letter ( ) locate upside of the letter ( ), or downside of it?”
▶
Located upside: “Left Hyperphoria.” Turn the dial clcokwise to increase BU prism, until the
cross is seen well.
▶
Located downside: “Right Hyperphoria.” Turn the dial counterclockwise to increase BD prism,
until the cross is seen well.
[Figure 10-21] Phoria Test without Fixation
Digital Refractor EDR-9000