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Comparison of the smartphone tonometer with other clinical tonometers in the upright position.
| Tonometer | Smartphone Tonometer Mean Difference (Bias) | Smartphone Tonometer 95% Limits of Agreement |
|---|---|---|
| Goldmann Applanation Tonometer | +0.24 | −4.35, 4.83 |
| Pneumatonometer | −3.91 | −7.66, −0.15 |
| TonoPen | −1.30 | −5.72, 3.12 |
| iCare | −1.39 | −6.48, 3.70 |
