What question did this study set out to answer?

This research aims to evaluate tear chloride concentration as an adaptive measure to contact lens types and their impact on eye response.

March 21, 2026

Tear Chloride as an Adaptive Index

Key Points

This research aims to evaluate tear chloride concentration as an adaptive measure to contact lens types and their impact on eye response.
Monitored tear chloride levels in response to rigid and hydrophilic contact lenses.
Quantitatively compared tear responses over the fitting period.
Measured changes from dispensing until full wearing time was achieved.
Initial tear imbalances were less with hydrophilic lenses compared to rigid lenses.
Most subjects returned to baseline tear levels within five days.
Reduction in subjective awareness correlated with tear level restoration.

Abstract

Abstract Tear chloride concentration was used as an indicator of hypotonic (reflex tear) response to contact lens presence in the eye. Individual responses to rigid and to hydrophilic lenses were thus monitored and quantitatively compared from the time of dispensing until full wearing time was achieved. Although the initial tear imbalances to hydrophilic lenses were somewhat less than those to rigid lenses, they were, nevertheless, detectable. Restoration to prefitting baseline levels was for the most part achieved within the first 5 days, and did generally parallel the reduction in subjective awareness experienced by the patient.

Ask AI

Helpful

Bookmark