What question did this study set out to answer?

To understand how squeezing of a soft contact lens affects tear exchange on the cornea during blinks.

March 21, 2026

A Lubrication Theory Model of Tear Exchange Under A Soft Contact Lens

Puntos clave

To understand how squeezing of a soft contact lens affects tear exchange on the cornea during blinks.
Calculated tear exchange using lubrication theory
Examined tear film thickness during normal blinking
Predicted 10 to 20% tear exchange at each blink
Focused on normal blink behavior and average tear film thickness of 8 to 10 microns

Resumen

ABSTRACT Tear exchange due to squeezing of a soft contact lens onto the cornea by the lid is calculated from lubrication theory. The theory predicts that for a normal blink and the usual tear film thickness (8 to 10 microns) there will be a 10 to 20% tear exchange at each blink.

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Cite This Study

HAYASHI et al. (Mon,) studied this question.

synapsesocial.com/papers/69be35d76e48c4981c674599 https://doi.org/https://doi.org/10.1002/j.2330-9512.1976.tb02063.x

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