Topcon MC-4S - Page 40

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CHART FUNCTIONS UNIQUE TO THE MC-4S
Executing "Astigmatism chart rotation function"
1 Select the chart applicable to the "Astigmatism chart rotation" function from the chart page.
2 Touch the [Rotate] button among the function buttons at the bottom of the screen on the KB-50S.
When the cylinder power and axis are already measured and the lens is already set on the mea-
suring head of the CV-5000, the cylinder axis is rounded to the 5-degree step value and the cyl-
inder power is temporarily set to 0.00D.
3 The chart on the screen of the MC-4S is changed to the following one.
Turn the dial of the KB-50S, and the deeper color line on the astigmatism chart is changed in the
dial turning direction.
Let the patient align the deeper color line on the chart with the line whose color is deeper in his/
her vision.
4 To exit the "Astigmatism chart rotation" mode, touch the [Rotate] button again.
The chart of the MC-4S is returned to the status before executing the "Astigmatism chart rotation"
function.
The cylinder power before executing the "Astigmatism chart rotation" mode is set with the current
cylinder axis on the measuring head of the CV-5000.
NOTES
• When operating through a mouse/personal computer, do not turn the dial but
click the button on the control window. Operate according to "Mouse Naviga-
tion".
• While the "Astigmatism chart rotation" mode is being executed in the KB-50S,
the display of "Dial Navigation" is opposite to the real axis value change.
• When changing to other charts, the "Astigmatism chart rotation" mode is also
exited.