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Artificial tears improved contrast sensitivity in dry eyes

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Artificial tears significantly improved contrast sensitivity in patients with dry eye, researchers in Turkey found.

T. Akin, of Haydarpasa Training Hospital in Istanbul, and colleagues evaluated 35 patients with dry eye and 20 healthy control patients. All patients had normal uncorrected or corrected visual acuity at baseline. The patients underwent contrast sensitivity testing at baseline and 5 minutes after receiving artificial tears.

Dry eye patients showed a significant increase in contrast sensitivity at both low and high spatial frequencies (P < .05), the investigators said.

"The impeded quality of vision seen in dry eye patients could be restored closer to normal with artificial tear therapy," they said.

After receiving tears, the control group showed a significant increase at low frequencies (P < .05) but not at high frequencies (P > .05), the authors noted.

The study is published in the November/December issue of the European Journal of Ophthalmology.