The optimal solution for the study of corneal and ocular aberrations

The Onda’s corneal topography function has the same reliability and excellence found in the entire family of Keratron™ topographers.

Ocular Aberrometry and Refraction can be done under accommodative stress without cycloplegics.

The innovative software is continuously updated to include new refractive investigation features.

The software now identifies the “Strehl ratio”, an aberrometric parameter that identifies the sphero-cylindrical correction that yields maximum visual acuity in the presence of higher order aberrations. The Onda’s combination of features allows customised ophthalmic correction and full ametropic management.

Keratron Onda

Corneal Topography

Measures the curvature, axial, height, wavefront, refractive, gaussian, differential.


Measures refraction in all pupillary conditions: photopic, mesopic, and scotopic.


Measures the pupil diameter and K angle in any lighting condition.

Dynamic Accommodation

Graphs accommodation according to defocus, astigmatism, coma, spherical aberration, and pupil.

Cataract Densitometry

Identifies the pupil area affected by lens opacity, in order to monitor and statistically analyse the type and extent of cataract progression.

Contact Lenses

Simulates the fit of gas permeable contact lenses for all major international manufacturers.

Technical Specifications

Parameters Specifications
Model Keratron Onda model REF 161401
Topographical Precision
Ophthalmometer Data (sim-K) within ±0.25D on a normal cornea
BFS (Best Fit Sphere) deviation typically within ±0.15D
Analysis area on the pupil 7x7 mm std (7.3x7.3 mm max)
Sensor Microlens Array OPTIKON design
Spatial resolution 128 microns ( 2350 points in the maximum pupil)
Wavelength SLD 840 nm
Wavelength LEDs 750 nm and 590 nm
Measurement Range -20D +10D (@VD=14mm) (sphere)
±10D (cylinder)
Defocus compensation -11D +5D (automatic and manual)
Objective measurement of the patient’s accommodative response from +1D -4D over the defocus
Zernike polynomials 7th order
Environmental Specifications
Storage temp. range between -10 °C and 60 °C
humidity 0-100% (cond. incl.)
atm pressure from 500 to 1060 hPa
Operation temp. range from 10 °C t o +40 °C
humidity 30-75% (non-condensing)
atm pressure from 700 to 1060 hPa
Electrical Specifications
Input voltage from 100 to 240 Volts AC
Frequency 50/60 Hz
Current consumption 70 VA
Fuses 2 x T 1 A (5 x 20 mm)
Regulatory compliance Medical Device Directive 93/42/EEC
Technical standards EN 60601-1:1998; EN 60601-1-1:2000;EN 60601-1-2:2001+A1:2006; IEC 60825-1:1993+A1:1997+A2:2001; EN 60601-1-4:1997+A1:1999

Brochures, Guides, and Documents

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Get in touch with us now!

1800 251 852

New South Wales
118 Adderley St, Auburn
NSW 2144
Phone: 02 9748 8777
Fax: 02 9748 8666
Unit 3, 5 Navigator Place, Hendra
QLD 4011
Phone: 07 3630 2366
Fax: 07 3630 2399
Western Australia
6 / 63 Russell St, Morley
WA 6062
Phone: 08 9376 3700

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