A Comparison of Tear Volume (by Tear Meniscus Height and Phenol Red Thread Test) and Tear Fluid Osmolality Measures in Non-Lens Wearers and in Contact Lens Wearers

Abstract

Even contemporary contact lens wear can have a small but measurable impact on the precorneal tear film osmolality or volume. The changes are internally consistent and, overall, support the idea that the PRT test provides a useful measure of tear meniscus volume.