Ocular Response Analyzer® (ORA) is the only tonometer that measures Corneal Hysteresis (CH), a superior predictor of glaucoma progression. Corneal Hysteresis is an indication of the biomechanical properties of the cornea differing from thickness or topography, which are geometrical attributes.

Ocular Response Analyzer: At a Glance
-Objective measurements - no operator influence
-Comprehensive patient management database
-Improved measurement repeatability
-Softer, quieter air-puff
-2x faster automated alignment and measurement
-Attractive, compact, all-in-one hardware platform
-Flexible product configuration for optimal space utilization in any office setting
-Innovative left / right mounting, 180-degree rotating, tilting screen
-Easy-to-use, integrated 12 inch touch display
-Optional wired keyboard and mouse available
-Optional motorized chinrest

Clinical Applications of the Ocular Response Analyzer:

The Ocular Response Analyzer enables clinicians to assess the cornea based on biomechanical tissue properties, rather than geometry only. It has been demonstrated that Corneal Hysteresis (CH) and Corneal Resistance Factor (CRF) measurements are significantly lower in keratoconus patients. Furthermore, CH and CRF are significantly reduced following refractive surgery as a result of complex biomechanical changes. CH and CRF provide a more complete characterization of corneal properties than CCT and topography alone, making these metrics useful in the pre-operative assessment of refractive surgery candidates.

What is Corneal Hysteresis?

Corneal Hysteresis (CH) is the difference in the inward and outward pressure values obtained during the dynamic bi-directional applanation process employed by the Ocular Response Analyzer, as a result of viscous damping in the cornea. It is a characterization of the cornea?s energy absorption capacity, which is a function of the biomechanical properties of the cornea.

Ocular Response Analyzer is the only instrument in the world capable of measuring corneal biomechanical properties and Corneal Compensated IOP.

How it works

The Ocular Response Analyzer utilizes a dynamic bi-directional applanation process to measure biomechanical properties of the cornea and the intraocular pressure of the eye. A precisely metered collimated air-pulse causes the cornea to move inwards, past applanation, and into a slight concavity. Milliseconds after applanation, as the air pulse force decreases, the cornea begins to return to its normal configuration. In the process, it once again passes through an applanated state.

An electro-optical system monitors the curvature of the cornea throughout the deformation process taking 400 data samples during the 20-millisecond measurement. Two independent pressure values are derived from the inward and outward applanation events. Viscous damping in the cornea results in an offset between the inward and outward pressure values. The difference between these two pressure values is Corneal Hysteresis (CH).


Comprehensive Pressure and Cornea Information

IOPcc (Corneal Compensated IOP) - New IOP measurement less affected by corneal properties.

CH (Corneal Hysteresis) - Measure of viscous damping in the cornea, providing new indicators for disease diagnosis and management.

CRF (Corneal Resistance Factor) - Total visco-elastic response of the cornea.

IOPg (Goldmann Correlated IOP) - Traditional IOP measurement for historical reference.

Advanced Technology

Patented dynamic bi-directional applanation process enables the only direct measure of corneal biomechanical properties.

Eliminates operator variance by utilizing microprocessor control technology and objective measurement criteria.

Patient and Operator Friendly

No chinrest and a soft, quiet air puff make the Ocular Response Analyzer a comfortable, non-intimidating experience for your patients.

Fully automatic alignment and measurement provides fast, repeatable results, allowing any member of your staff to conduct an exam.

Powerful Software Package

Enables automatic data capture of all measurements for analyzing trends, treatment efficacy, and diurnal variations.

Comprehensive patient management database simplifies record keeping.

Comprehensive printout for hard-copy results.

Export data for use in other applications.

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Reichert Ocular Response Analyzer G3 (ORA)

  • Product Code: ORA-G3
  • Availability: In Stock
  • $6,700.00

  • Ex Tax: $6,700.00

This product has a minimum quantity of 2