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Measuring Retinal Blood Pressure: A Comparison Between SmartLens and Contact-glass Dynamometry
Löw U., Hille K., Ruprecht K. W.,
Universitätskliniken des Saarlandes, Augenklinik und Poliklinik (Homburg/Saar)
Purpose: The new Kontaktglasdynamometry and the SmartLens allow to increase the intraocular pessure with simultaneous visualisation of the central retinal artery. The aim of our clinical study was to analyse the reproducibility of both devices and the correlation to the systemic blood presure.
Methods: This study investigated 29 patients (mean age 65 years). The retinal blood pressure was measured by means of the SmartLens system followed by a record with the Kontaktglasdynamometry. The measurements were repeated 3 times with each device. During the same session systemic blood pressure was taken from the A. brachialis (Riva Rocci).
Results: We found a linear correlation of systemic blood pressure and the values recorded by the Kontaktglasdynamometry (r = 0,88) and SmartLens (r = 0,80). Comparing the reproducibility of measurements Kontaktglasdynamometry and SmartLens showed a standardeviation of 0,768 and 3,67 respectively.
Conclusions: SmartLens and Kontaktglasdynamometry allow reliable measurement of retinal blood pressure. The reproducibility of measurment by Kontaktglasdynamometry seems to be higher compared to the SmartLens device.