Hydrodynamic Interaction Between Tear Film and Air Puff From Noncontact Tonometry.

ABSTRACT:

Purpose

The purpose of this study was to investigate the mechanism of potential droplet formation in response to air puff deformation with two noncontact tonometers (NCTs).

Methods

Twenty healthy volunteers were examined using two NCTs, Ocular Response Analyzer and Corvis ST, and two contact tonometers, iCare and Tono-Pen. High-speed videos of the tear film response were captured with at spatial resolution of 20 microns/pixel at 2400 fps. Droplet size, droplet velocity, distance between air puff impact location, and the tear meniscus-lid margin were characterized.

Results

One subject was excluded due to technical issues. Droplets were detected only in tests with instilled eye drop. Videos showed the tear film rolls away from the apex while remaining adherent to the oc

SUBMITTER: Yousefi A 

PROVIDER: S-EPMC8819281 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature