luxvision LRK-7000 User Manual

81
13.Accuracy
- The accuracy specifications are based on the results of model eye testing performed in accordance
with ISO10342 Ophthalmic instruments- Eye Refractometers, ISO10343 Ophthalmometers.
1) Refractometry
Criterion
Measuring range
Maximum
scale interval
Test device
Tolerance
SPH
0.00D~±10D
0.25D
0D, ±5D, ±10D
±0.25D
＞│±10D│
±15D
±0.50D
CYL
0D ~±10D
0.25D
0D ~±10D
±0.25D
＞│±10D│
＞│±10D│
Axis
0.25D~0.50D
0°~ 180°
1°
±10°
0.50D~3.00D
±5°
＞3D
±3°
a. the refractive error of the test device shall not differ by more than 1,0 D from the nominal
value above.
b Cylinder axis shall be indicated as specified in ISO 8429.
2) Keratometry
NO
Criterion
Requirement
1
Measuring range
6.5 ㎜ to 9.4 ㎜
2
Radii readings
for
Continuously indicating instruments
Scale interval of 0.5 ㎜
Digitally indicating instruments
Increment 0.02 ㎜
3
Measurement accuracy
(twice the standard deviation, i.e. 2σ)
±0.025 ㎜
3) Measurement of direction of principal meridians
NO
Criterion
Requirement
1
Measuring range
0°to 180°
2
Meridian direction
reading
continuously indicating scales
scale interval 5°
digitally indicating scales
increment 1°
3
Measurement accuracy
using test device
(twice the standard
(twice the standard
deviation, i.e. 2σ)
for principal meridional differences in
radii of curvature < 0,3 mm
4°
for principal meridional differences in
radii of curvature 0,3 mm
2°
Angular indications shall be in accordance with ISO 8429.

luxvision LRK-7000 Specifications

General

Brand	luxvision
Model	LRK-7000
Category	Medical Equipment
Language	English