Wide Variation of Squeezing Force and Dispensing Time Interval among Eyedropper Bottles.

ABSTRACT:

Purpose

We aimed to investigate squeezing force and dispensing time interval of the first and second eye drops among a variety of eyedropper bottles and to clarify associated factors within these parameters.

Methods

A total of 87 eyedropper bottles were involved in this study. We developed a squeezing force measuring system consisting of a syringe pump, digital force gauge, and custom-made test stand to measure the squeezing force and dispensing interval. The eyedropper bottle was housed in the system vertically, and measurements were repeated five times. We investigated the differences in squeezing force and dispensing interval by categories, including those that targeted ocular disease, brand or generic eyedroppers, shapes of eyedropper bottles, and the presence of a membr

SUBMITTER: Kashiwagi K 

PROVIDER: S-EPMC6501172 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature