Corneal Hysteresis ORA Measurement

Measure corneal hysteresis (CH) using Ocular Response Analyzer (ORA) to assess biomechanical corneal properties. CH <9.4 mmHg identifies eyes at higher risk of glaucoma progression independent of IOP.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Measure corneal hysteresis (CH) using Ocular Response Analyzer (ORA) to assess biomechanical corneal properties. CH <9.4 mmHg identifies eyes at higher risk of glaucoma progression independent of IOP

Each component has a specific meaning:

  • Ocular Response Analyzer — The ocular response analyzer recorded for the scenario being assessed.

Note: Interpret the corneal hysteresis result against the thresholds and context described above.

How to Use

Enter the Ocular Response Analyzer for the scenario you are assessing. Measure corneal hysteresis (CH) using Ocular Response Analyzer (ORA) to assess biomechanical corneal properties. CH <9.4 mmHg identifies eyes at higher risk of glaucoma progression independent of IOP. Use the corneal hysteresis result to inform your calculation.

Frequently Asked Questions