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SAFETY PRECAUTIONS: Usage Precautions
During use
CAUTION
• Do not perform servicing or maintenance on the device during use.
• Before use, perform visual and operation checks. If abnormal conditions are encountered, stop
using the device.
If the device is used under abnormal conditions, intended results may not be obtained. Also, unantici-
pated malfunctions or health hazards may occur due to inappropriate diagnoses.
• In the event of smoke or strange odors, immediately turn off the device and disconnect the power
plug from the power outlet.
Once it is confirmed that the smoke has stopped, contact NIDEK or your authorized distributor.
Use of the device under such abnormal conditions may cause fire or electric shock. In case of fire, use a
dry chemical (ABC) extinguisher to extinguish the fire.
• Immediately replace the power cord if the internal wires are exposed, power is intermittent when the
power cord is moved, or the cord and/or plug are hot to the touch.
Electric shock or fire may occur.
• Should the device fail, disconnect the power cord from the power outlet and contact NIDEK or your
authorized distributor without touching the interior of the device.
Electric shock may result.
• When the device is being held for measurement, be sure to use the neck strap.
Accidental dropping of the device may result in injury or malfunction.
Malfunction due to the device dropping or impacting with something is not covered by the warranty. A
repair fee will be charged for resulting malfunctions despite the device still being under warranty.
• Before measurement, explain the measurement purpose and method sufficiently to patients.
• Before placing the device over the patient’s face, release the forehead rest.
Otherwise, parts other than the forehead rest may come into contact to the patient’s face.
• Before and after use of the device, and before measuring each patient, clean the forehead rest with
clean gauze or absorbent cotton. As necessary, dampen a cloth with rubbing alcohol and gently
wipe them off.
• Keep the measuring window free of fingerprints and dust.
Measurement accuracy may be adversely affected.
• The forehead rest is made of resin and therefore cannot be sterilized. When using the device in an
operating room, do not use the forehead rest.
• Do not pull the power cord to disconnect it from the power outlet. Always hold it by the plug.
The metal core of the cord may be damaged and electric shock, malfunction, or fire may result.
• Before measurement, confirm that the eye detected is correctly indicated as the one to be measured
(R/L).
There may be cases where the eye to be measured (R/L) is not detected correctly due to the patient's
face shape or such. If the R/L indication is incorrect, press the R/L button to select the correct eye to be
measured (R/L).
• The measured values of objective refractive error obtained by the HandyRef-K are intended to be
used as a reference for lens prescription for the correction of visual acuity with spectacles or contact
lenses. Manifest refraction must be performed as the basis for the spectacle or contact lens pre-
scription.
• Instruct the patient to look at the picture of a balloon with their eyes wide open. Start measurement
after confirming that the instruction is properly followed by the patient. Be careful not to perform
measurement while the device is misaligned to the patient’s eye.
Proper measurement may not be performed.
