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OPERATING PROCEDURE: AR (refractive error) and KM (corneal curvature radius) Measurements
3.3.1
Error messages during AR or KM measurement
Error messages during AR measurement or KM measurement are displayed in the numeric fields of
the measured values.
O
Error messages during AR measurement
O
Error messages during KM measurement
• Instruct the patient to close their eye before starting the next measurement.
Let the eye rest to avoid measurement failure by blinking.
Error message
Details and remedies
BLK
(Error due to blinking)
Measurement failed due to blinking of the patient’s eye or such.
Instruct the patient not to blink or not to move the eye until measurement
is complete.
After the eye has stopped blinking, perform measurement again.
This error also may occur when reflected light from the fundus is low.
ALM
(Alignment error)
Alignment is not proper.
Perform alignment and measurement again.
In manual mode (auto tracking OFF + auto shot OFF), this message is
not displayed.
+OVR
(Outside SPH positive range error)
The sphere value is over the measurable limit of the + side.
-OVR
(Outside SPH negative range error)
The sphere value is over the measurable limit of the - side.
COVR
(Outside CYL range error)
The cylinder value is over the measurable limit.
CONF
(Measured data confidence index error)
Low-confidence data is obtained.
Measure the subject again.
* When the “44. ERROR DATA” parameter is set to “NO”.
S, C, A data displayed in yellow
(Measured data confidence index error)
Low-confidence data is obtained.
Measure the subject again.
* When the “44. ERROR DATA” parameter is set to “YES”.
Error message
Details and remedies
BLK
(Error due to blinking)
Measurement failed due to blinking of the patient’s eye or such.
Instruct the patient not to blink or not to move the eye until measurement
is complete.
After the eye has stopped blinking, perform measurement again.
ALM
(Alignment error)
Alignment is not proper.
Perform alignment and measurement again.
FAR
(Focus error: Too far from the patient’s
eye)
Focusing is not proper.
Perform focusing and measurement again.
NEAR
(Focus error: Too close to the patient’s
eye)
Focusing is not proper.
Perform focusing and measurement again.
+OVR
(Outside corneal curvature radius positive
range error)
The corneal curvature radius is too large and over the measurable
limit.
Summary of Contents for ARK-1S
Page 1: ...AUTO REF KERATOMETER AUTO REF KERATOMETER ARK 1s ARK 1s OPERATOR S MANUAL OPERATOR S MANUAL ...
Page 6: ...IV ...
Page 76: ...70 OPERATING PROCEDURE Operation when Peripheral Devices are Connected ...
Page 112: ...106 SPECIFICATIONS AND TECHNICAL INFORMATION EMC Electromagnetic Compatibility ...