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ORA G3
OCULAR RESPONSE ANALYSER®
Manufacturer: REICHERT
Product code: DSG3
Measure beyond pressure – with Corneal Hysteresis + IOPcc
The Reichert Ocular Response Analyser® G3 (ORA G3) is the only tonometer that measures Corneal Hysteresis (CH) - an advanced parameter proven to be a superior predictor of glaucoma progression.
Corneal Hysteresis reflects the biomechanical properties of the cornea, providing insight beyond corneal thickness or topography. Studies show that eyes with lower CH exhibit faster rates of visual field loss, making CH a critical factor in glaucoma risk assessment and patient management.
Corneal Hysteresis: a key indicator in Glaucoma decision making
Glaucoma remains the second leading cause of irreversible blindness worldwide, and predicting disease progression can be challenging.
Research has consistently demonstrated that Corneal Hysteresis is more closely associated with glaucoma progression than intraocular pressure (IOP) or central corneal thickness (CCT).
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CH explains over three times more variation in progression rates than CCT¹
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Low CH is strongly linked to faster glaucoma deterioration
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CH measurement provides clinicians with a more confident risk assessment
Corneal Compensated IOP (IOPcc): true pressure measurement
ORA G3 provides Corneal Compensated Intraocular Pressure (IOPcc) — a patented measurement proven to be less affected by corneal properties than Goldmann or other tonometers.
Unlike conventional correction formulas that adjust IOP for corneal thickness, IOPcc considers biomechanics, resulting in a truer measure of intraocular pressure.
Benefits of IOPcc:
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Less influenced by corneal properties²
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Better correlated with glaucomatous damage⁶
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Exclusive, patented Reichert technology
Fast, reliable and comfortable
ORA G3 offers fully automated alignment and measurement with a single touch. The integrated touchscreen displays CH, IOPcc, Goldmann-correlated IOP (IOPg), and Waveform Score (WS) instantly.
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Automatic bi-directional applanation for simultaneous CH and IOPcc measurement
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Waveform Score technology for reliable, repeatable results
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Data export capability for effortless EMR integration
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Delegable operation – easily used by trained technicians
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Non-contact measurement, eliminating the need for topical anaesthesia, fluorescein, or disposable prisms – saving time and reducing infection risk
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No-chinrest design for faster, more comfortable patient positioning
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Patented soft air pulse that automatically adjusts to each eye for maximum comfort
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Highly patient-friendly experience – in a paediatric study, 89.8% of children preferred the ORA over Goldmann applanation tonometry⁷
There is a myriad of reasons to abandon GAT and shift to ORA, but most importantly, we rely on IOP as a guide to caring for patients. Ultimately, the measure of IOP that best predicts who will get worse is the device most able to help us make the right decisions.