What question did this study set out to answer?

This research aims to examine how corneal curvature changes throughout the day in individuals wearing flexible contact lenses.

March 21, 2026

Diurnal Variations in Corneal Curvature After Wearing Flexible (Hema) Contact Lenses

Key Points

This research aims to examine how corneal curvature changes throughout the day in individuals wearing flexible contact lenses.
Measured keratometer readings in five lens wearers
Readings taken in the morning before lens use and at intervals during the day
Specifically assessed both horizontal and vertical curvatures
Mean horizontal curvature showed less than 0.25 D variation throughout the day
Mean vertical curvature varied slightly more than 0.25 D
Indicates less diurnal change in curvature for Soflens™ compared to hard contact lenses

Abstract

ABSTRACT Using five wearers of the Bausch and Lomb Soflens™ as subjects, keratometer readings were taken in the morning prior to wearing lenses and at regular intervals throughout the day. Mean horizontal curvature varied less than 0.25 D throughout the diurnal period and the mean vertical curvature varied only slightly more than 0.25 D. The results of this study make it appear that there is considerably less diurnal change in corneal curvature for wearers of the Soflens™ than for conventional hard contact lens wearers.

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