Potec PRK-8000, Operation Manual

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PRK-8000 Operation Manual
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(5) Repeated measurement
Measurement could be repeatedly performed if necessary.
z
The newest result will be displayed on the monitor whenever measured.
z
Maximum of 10 newest data items for both right and left eyes will be stored in
memory except error data. And those data can be showed in the DISPLAY mode
window.
(6)
Measure the Other Eye.
Slide the stage to the right side and measure the left eye.
z
After both eyes are measured, pupil distance(PD) will be displayed on the monitor.
z
If stage is slid to the right eye again without pressing the PRINT button, the last
measurement will be displayed. And when measuring button is pressed, the new
value will be added to them.
NOTES: Safety information about infrared light radiation for measurement
As light sources for measurement, this instrument adapted two type of infrared LED. It was
chosen to satisfy the amount of energy exiting from the instrument never exceed the limit
value recommended by the international standard ISO 15004. This condition is satisfied even
when the instrument is operating at maximum light intensity and maximum aperture!
(Maximum intensity is the highest brightness the instrument is capable of delivering, including
the highest brightness achievable if overvoltage is provided)
Detailed radiation information at normal usage of this instrument is like bellows.
①
Keratometry @ 770nm (LED type IWL-BR30F):
- Output < 0.03 mW/cm
2
(Group 1 limit ≤ 20mW/cm
2
for unweighted corneal and lenticular infrared radiation
irradiance, EIR-CL @ wavelength of 770 to 2500nm, acc. To ISO15004-2:2007,
5.4.1.4);
②
Refractometry @ 880nm (LED type HE8807SG):
- Output < 0.15 mW/cm
2
(Group 1 limit ≤ 0.7mW/cm
2
for weighted retinal visible and infrared radiation
thermal hazard, EVIR-R @ wavelength of 380 to 1400nm, acc. To ISO15004-2:2007,
5.4.1.6 a);