EZER EDR 9000, Operation Manual

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97
10.22
P ho ria Te s t w ith Fixa tio n
! Purpose: Subjective test, progress Heterophoria in a way of Pola Cross with Fixation.
!
Chart: Polarized Cross Chart with Fixation
! Auxiliary Lens: Polarized Filter with 135 degrees for right eye, and 45 degrees for left eye.
! Target: The cross on the right upper side in 2 directions seen witht the right eye and the cross
on the left lower side in 2 directions seen with the left eye are united and seen as one.
! Way of Test
1. On Special Chart clause of touch screen, enter Heterophoria Mode by pressing Pola
Cross Chart with 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. First of all, to start with Horizontal Heterophoria, ask the patient as following.
4. ”Does the letter (
ㄴ
) locate on the left side of the letter (
ㄱ
), 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 (
ㄴ
) locate upside of the letter (
ㄱ
), 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 10-22] Phoria Test with Fixation
Digital Refractor EDR-9000