Effect of variable tinted spectacle lenses on visual performance in control subjects.

Purpose: To evaluate quantitatively the effects of tinted spectacle lenses on visual performance in individuals without visual pathology.

Methods: Twenty-five subjects were assessed by measuring contrast sensitivity with and without glare. Gray, brown, yellow, green, purple, and blue lens tints were evaluated. Measurements were repeated with each lens tint and with a clear lens, and the order was counterbalanced within and between subjects. Glare was induced with a modified brightness acuity tester.

Results: All subjects demonstrated an increase in contrast thresholds under glare conditions for all lens tints. However, purple and blue lens tints resulted in the least amount of contrast threshold increase; the yellow lens tint resulted in the largest contrast threshold increase.

Conclusions: Purple and blue lens tints may improve contrast sensitivity in control subjects under glare conditions.