§10
SPECIFICATIONS
Measurement of refractive power (AR measurement) (VD=12 mm)
Measurable range
Sphere:
-18.00 D - +23.00 D
Cylinder: 0 D - ±8.00 D
Axis:
0º - 180º
[Accuracy*
1
]
The measurement accuracy of the instrument satisfies the
following requirement set by ISO10342.*
2
Measuring speed
0.3 seconds/eye
Minimum pupil diameter
φ
2.5 mm
measurable
Vertex distance
0 mm/10.5 mm/12 mm/13.75mm/15 mm/16.5 mm
Indication step
Powers:
0.01 D/0.12 D/0.25 D
Axis:
1º / 5º
Target fixation
Auto-fogging system
PD measurement
Measurable range
30 mm - 85 mm (Near PD : 28 mm - 79 mm)
Indication step
1 mm
Criterion
Measuring range
Deviation from the
nominal value
Spherical and
cylindrical vertex
power
0.00 to ± 10.00D
± 0.25 D
>10.00D (absolute)
± 0.50 D
Cylinder axis for
cylinder power
0.25D to 0.50D
± 10
>0.50D to 3.00D
± 5
>3.00D
± 3
º
º
º
ISO10342
*
1
The accuracy specifications are based on the results of eye
model testing performed in accordance with ISO 10342:
1997, Ophthalmic Instruments—Eye Refractometers.
*
2
Cylinder axis shall be indicated as specified in ISO 8429.
Summary of Contents for AR-600
Page 1: ...NIDEK AUTO REFRACTOMETER Model AR 600 OPERATOR S MANUAL...
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Page 16: ...2 9 2 9 Labels The following labels provide safety information about each part or or or...
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