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Numbers of eyes having IOP within each sub-range of ISO draft standard on tonometers
| IOP range | Number of eyes |
|---|---|
| <18 mmHg | 36 |
| 18–24 mmHg | 30 |
| >24 mmHg | 34 |
Abbreviations: IOP, intraocular pressure; ISO, international Organization for Standardization.
