Opticare | Envision the Possibilities

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.

Functions

Corneal Topography

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

Refraction

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

Pupillometry

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
Aberrometry
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