Topcon TRK-3 OMNIA - Specifications and Performance

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SPECIFICATIONS AND PERFORMANCE
SPECIFICATIONS AND PERFORMANCE
Conformity standards
• ISO 8612: 2009 Ophthalmic instruments–Tonometers
• ISO 10342: 2010 Ophthalmic instruments–Eye refractometers
• ISO 10343: 2014 Ophthalmic instruments–Ophthalmometers: Type B
REF measurement
Measuring range Spherical refractive power: ‒ 25 D to +22 D
(Display value resolution: 0.12 D or 0.25 D)
Astigmatic refractive power: 0D to ±10 D
( Display value resolution: 0.12 D or 0.25 D)
Direction of astigmatic axis: 0° to 180° ( Display value resolution: 1° or 5°)
(where, spherical refractive power + astigmatic refractive power ≤ +22 D,
or spherical refractive power + astigmatic refractive power ≥ ‒25 D)
The dioptric powers are indicated with reference wavelength λ
d
= 587.56
nm.
Measurable mini-
mum pupil diameter
Φ2.0 mm
PD measuring
range
20 mm to 85 mm (Display value resolution: 1 mm)
KRT measurement
Measuring range Cornea curvature radius: 5.00 mm to 10.00 mm
(Display value resolution: 0.01 mm)
Corneal refractive power: 67.50 D to 33.75 D
(Display value resolution: 0.12 D or 0.25 D)
(where, corneal refractive power=1.3375)
Direction of corneal principal meridian: 0° to 180°
(Display value resolution: 1° or 5°)
Corneal diameter measurement
Measuring range 2.00 mm to 14.00 mm (Display value resolution: 0.25 mm)
Intraocular pressure measurement
Measuring range 7 mmHg to 60 mmHg (Display value resolution: 1 mmHg)
Average value resolution: 1 mmHg or 0.1 mmHg
Measuring mode 7 to 30 mmHg or 30 to 60 mmHg, selectable range
Corneal thickness measurement
Measuring range 0.400 mm to 0.730 mm (Display value resolution: 0.001 mm)