Validation of the iFalcon V100 Rebound Tonometer in Canine Eyes.

iFalcon V100 accurately measures canine IOP across physiological and mild pathological ranges.

This validation study assessed the iFalcon V100 rebound tonometer's accuracy for measuring intraocular pressure (IOP) in canine eyes using four freshly enucleated normal eyes. Researchers created a controlled pressure system using a water syringe in the vitreous chamber and an implantable pressure sensor in the anterior chamber, testing pressures from 5 to 50 mmHg. The iFalcon V100 demonstrated strong linear correlation with direct sensor readings (r = 0.96) and minimal bias (+0.34 mmHg), with 95% limits of agreement from -4.29 to +4.98 mmHg. The device showed slightly higher readings at lower pressures and required multiple attempts at 5-10 mmHg. The validated range of 5-50 mmHg encompasses normal physiological pressures and common pathological levels, though the study did not evaluate performance during acute glaucoma (70-80 mmHg). Overall, the iFalcon V100 provides clinically acceptable and accurate IOP measurements in normal canine eyes within this range.

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