Performing an Exam
(continued)
Cross Cylinder
(continued)
Smart Test
Note:
Tap
Test
to switch the type of XCyl test (Manual/Smart/Split Cyl).
1. Tap
XCyl
on the menu bar at the bottom of the main screen.
2. Tap
Smart
to begin the Smart Cylinder test. Spherical equivalent is maintained during Cylinder
power adjustment.
If the current Cylinder value is zero, an Astigmatism check will automatically start, and a 0.50 D JCC lens
will be placed in the Phoroptor head. Refer to the
Examination for Astigmatism
section of this manual.
Note:
The degree increment will appear in the lower left of the screen. Tap to cycle through 1°, 2°, 5°,
10°, or 20°.
3. Turn the
CONTROL KNOB
to present position 1 and position 2 to the patient. The direction of the
Axis change is indicated in the lens aperture at the top of the screen. The orange lines represent the
current axis. The blue lines represent the direction of the axis change offered to the patient.
4. Ask the patient: “Which is better, 1 or 2?”
5. If the patient states a preference, tap
1
or
2
on the screen, or
turn the
CONTROL KNOB
to that number and press the button.
6. Repeat steps 3-5, until 1 and 2 are equal. As the patient re-
sponds, the system automatically reduces the axis change of-
fered at each step.
Note:
It is possible to adjust axis beyond the increment that was selected for the axis adjustment. Turn
the
CONTROL KNOB
8 click stops in one direction when offering position 1 or 2 to the patient.
After the 8
th
click stop, the axis changes in 1° increments. This allows the user to freely modify
the axis in that direction.
7. When the test determines the final axis has been reached, it will automatically proceed to the Cylin-
der power adjustment step. At any point, to advance to the next step, press the
ENTER
button or tap
Equal.
51
16243-101 Rev. G
Содержание VISUTRON 900 Touch
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