The Tomey OA-2000 is an advanced optical biometer featuring Fourier-domain axial length measurement, integrated corneal topography, and comprehensive IOL power calculation formulas. Designed for precise cataract surgery planning and anterior segment analysis.
The TOMEY OA-2000 Optical Biometer delivers fast, precise, and comprehensive refractive measurements by integrating topography, axial length, lens thickness, and pachymetry—creating the ideal dataset for advanced ray tracing. This powerful combination ensures excellent IOL predictions, even in challenging eye conditions or toric IOL cases.
With a single measurement, it captures biometry of the entire eye, including ACD, pupil diameter, and white-to-white distance. Designed for superior usability, the OA-2000 offers outstanding optical results, perfect K values for optimal toric outcomes, and the advanced Hill-RBF method for exceptional post-refractive accuracy. Its open data system, intuitive interface, and quick access to full eye data ensure improved refractive outcomes and precise targeting—every time.
TOMEY Ultrasound A Scan AL-4000 measures the distance to living tissue using ultrasound waves generated by the transducer built into the measurement probe. This device is designed to measure axial length and corneal thickness in optical clinics and allows you to identify areas of pathological change by observing mode-A waveforms.
Tomey OA-2000 Features
Software
Advanced Optical Biometry for Cataract Planning
The Tomey OA-2000 is a high-precision optical biometer that uses Fourier-domain axial length measurement technology to deliver accurate, reproducible results. Designed to support modern cataract surgery workflows, the system integrates axial length measurement, corneal curvature analysis, and topography into one compact diagnostic platform.
Its high-speed acquisition system automatically detects measurement points even when the crystalline lens is unclear, improving reliability in complex cases.
Key capabilities include:
- Fourier-domain axial length measurement
- Corneal curvature radius measurement
- Integrated corneal topography (up to 5.5 mm corneal capture)
- Axis support for toric IOL alignment
- Internal database storage
Comprehensive IOL Power Calculation
The OA-2000 includes multiple IOL power calculation formulas to support both standard and post-refractive-surgery cases. The system allows up to 15 lens registrations and provides a streamlined workflow from pre-operative evaluation to surgical planning.
Supported formulas include:
- SRK-II
- SRK-T
- Holladay
- Hoffer Q
- Haigis
- Haigis optimized formula
- Haigis standard formula
- SRK Showa
- Shammas-PL
- Double K SRK-T
The integrated one-shot IOL power calculation allows simultaneous processing of axial length, corneal curvature, corneal thickness, and anterior chamber depth measurements.
Clinical Usability & Workflow
The OA-2000 features a 10.4-inch tilting monitor for ergonomic operation and intuitive touchscreen alignment. Automatic alignment modes enable easy initiation of measurements, while manual control via a joystick is available when needed.
For cases where optical measurement is limited (e.g., dense cataracts), the unit can be connected wirelessly to an ultrasonic axial length measurement unit (AL-4000).
| Measurement | Range |
|---|---|
| Axial Length | 14 – 40 mm |
| Anterior Chamber Depth | 1.5 – 7.0 mm |
| Crystalline Lens Thickness | 0.5 – 6.0 mm |
| Corneal Thickness | 0.2 – 1.2 mm |
| Corneal Curvature Radius | 5.0 – 11 mm |
| Pupil Diameter | 1.5 – 13 mm |
| Corneal Diameter | 7 – 16 mm |
| Measurement Accuracy | Value |
| Axial Length | ±0.03 mm |
| Anterior Chamber Depth | ±0.05 mm |
| Crystalline Lens Thickness | ±0.05 mm |
| Corneal Thickness | ±5 µm |
| Corneal Curvature Radius | ±0.02 mm |
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If you want a practical cataract-biometry setup that covers both routine and “problem eyes,” the TOMEY OA-2000 + Barrett Formula + AL-4000 A-Scan combo is a strong, workflow-friendly choice.