Related Experiment Video
Updated: Jul 14, 2026

Pulse Wave Velocity Testing in the Baltimore Longitudinal Study of Aging
Published on: February 7, 2014
[The Pulsair manual noncontact tonometer]
Abstract:
The authors present a report on their own experience with a manual contact-free tonometer Pulsair of Keeler Co. Ais compared with results obtained by means of the manual aplanation Perkins tonometer of Clement Clarke International Ltd. in the group of patients with IOP under 2,8 kPa the arithmetic means of four readings, the scatter of mean values and standard deviations assessed by both methods were not significant. Correlation coefficient 0.92 (p less than 0.001). In the group of patients with glaucoma and hypertonics with IOP of 2.93 kPa and more the arithmetic means of four readings were significantly higher (at the 1% level) in contact-free tonometry. Correlation coefficient 0.95 (p less than 0.001). The authors emphasize the main advantage of the contact-free manual tonometer: safety, rapid procedure, objectivity, accuracy, manual use.
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