178
TEST METHOD
Binocular Visual Function Test
4.4.9
Maddox test (horizontal phoria)
Use: To detect horizontal phoria
Chart: Fixation
Auxiliary lens: Horizontal maddox rod to the right eye, rotary prism to the left eye
Ideal appearance:
Right eye
Left eye
Binocular vision (Orthophoria)
1
Present the fixation chart.
Press
.
The horizontal maddox rod is placed in the right measuring window.
The base in/out prism powers can be entered.
2
Ask the patient, “Is the white spot shifted to the left or right? Or, it is overlaid on the red
bar?”
When the spot is shifted to the left or right, correct it as follows:
Appearance of
chart
Phoria
Correction
<1> The white spot
is at the left of the
red bar.
Esophoria
Press
. Turn the dial clockwise to add the BO prism
power until the spot is overlaid on the bar.
<2> The white spot
is at the right of the
red bar.
Exophoria
Press
. Turn the dial counterclockwise to add the BI
prism power until the spot is overlaid on the bar.
• 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.
• Use
or
instead of the dial for fine adjustment.
• When the prism power is added, the prism power can be added in 0.5 D increments by
adding the prism power for single-eye compared to both eyes.
Dial 1.0
0.5
,
0.2
0.1
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Содержание RT-5100
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Страница 46: ...28 BEFORE USE Getting Started and Exiting 161221687130 承認済 Uncontrolled copy when printed ...
Страница 226: ...208 TEST METHOD Visual Acuity Test by ETDRS chart 161221687130 承認済 Uncontrolled copy when printed ...
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