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Tinted contact lenses increase higher-order aberrations, diminish optical quality

Graefes Arch Clin Exp Ophthalmol. 2009;247(2):721-832.

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Wearing cosmetically tinted soft contact lenses increased ocular higher-order aberrations and diminished contrast sensitivity in mesopic and photopic conditions.

"Tinted contact lens wearers should be sufficiently informed about the possible reduction in optical quality of the eye and quality of vision," the study authors said.

The study included 44 eyes of 22 subjects. Investigators assessed visual acuity, contrast sensitivity in photopic and mesopic conditions, and ocular higher-order aberrations. The area under the log contrast sensitivity function (AULCSF) was also determined. Patients were fit with Acuvue Colours contact lenses (Vistakon).

Wearing tinted contact lenses significantly reduced log contrast sensitivity at all spatial frequencies (P < .05) and AULCSF (P < .0001). However, visual acuity at 100% contrast did not change. Tinted lenses reduced log mesopic contrast sensitivity with and without glare.

The tinted lenses increased coma-like, spherical-like and total higher-order aberrations (P < .0001). Changes in total higher-order aberrations correlated significantly with changes in AULCSF (P < .05).