Tear instability importance, mechanisms, validity and reliability of assessment

Conclusions Fluorescein tear break up time assessments cannot be standardised and less-invasive methods are not yet standardised. Objective less-invasive and subjective fluorescein break up time tests do not appear to be measuring the same tear phenomena although both should be performed before other invasive procedures.
Source: Journal of Optometry - Category: Opthalmology Source Type: research