15
BEFORE USE
Configuration
1
14. Cross cylinder keys
Place a cross cylinder lens to measure the cylindrical axis or power.
When the key is pressed with both eyes open, the left measuring window is occluded automatically.
Open the left measuring window with
to perform the astigmatism test with both eyes open.
*5
The cross cylinder lens to be inserted can be selected with the “Cross cylinder (XC) test” parameter.
When the parameter is set to ±0.25 or ±0.50, the cross cylinder lens is inserted as follows:
14-1.
• In the cylindrical axis measurement, the cross cylinder lens is inserted so that the minus axis is located at 45° from the
minus axis position of the cylindrical lens.
• In the cylindrical power measurement, the cross cylinder lens is inserted so that the minus axis is located at 90° from
the minus axis position of the cylindrical lens.
• Clears the prism data for the right eye in prism entry mode.
14-2.
• In the cylindrical axis measurement, the cross cylinder lens is inserted so that the minus axis is located at 135° from
the minus axis position of the cylindrical lens.
• In the cylindrical power measurement, the cross cylinder lens is inserted so that the minus axis is located at 0° from
the minus axis position of the cylindrical lens.
• Clears the prism data for the left eye in prism entry mode.
•
+
switches the time display to the refraction elapsed time. When the refraction elapsed time has
already been selected, the time is cleared and start the count again.
15. Value change keys
Functions as the same as the dial.
15-1.
Increases the value to the positive side in 1 increments.
15-2.
Decreases the value to the negative side in 1 increments.
*5.
Both windows remain open by pressing
,
,
,
, Auto, ±.25, or ±.50 function key.
161221687130 承認済
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Содержание RT-5100
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