According to Healio, yellow blue-blocking intraocular implants have no impact on sleep and mood.

The study she presented was the first randomized, multicenter study evaluating the effect of IOL color on sleep and mood by comparison of white and yellow implants. A total of 204 patients were included and randomly assigned to implantation with white or yellow IOLs. After surgery, they were asked to keep a sleep diary, recording specific observations on sleep patterns and variations, to evaluate sleep quality on a scale 0 to 4, and to fill in a mood self-assessment questionnaire.

“No significant difference was found between patients implanted with white and yellow IOL implants for any of the variables analyzed in the study,” Zambrowski said. “We could find no evidence of an effect of IOL color on sleep and mood.”

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