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Updated: Jun 26, 2026

Measuring the Behavioral Effects of Intraocular Scatter
Published on: February 18, 2021
Effect of a blue-light-blocking intraocular lens on the quality of sleep
John A Landers1, David Tamblyn, Don Perriam
1Department of Ophthalmology, Repatriation General Hospital, Adelaide, Australia. john.landers@bigpond.com
Purpose:
To evaluate whether implantation of a blue-light-blocking intraocular lens (IOL) affects sleep quality.
Setting:
Repatriation General Hospital, Adelaide, Australia.
Methods:
This study comprised patients who had bilateral cataract surgery during the preceding 12 months with implantation of a conventional SI40NB IOL or an AcrySof Natural SN60WF blue-light-blocking IOL. Patients were contacted by telephone at least 6 months after second-eye surgery, and the Pittsburgh Sleep Quality Index (PSQI) questionnaire was administered. Results were compared between groups.
Results:
Of the 49 patients, 31 received conventional IOLs and 18, blue-light-blocking IOLs. The mean age of the patients was 80 years +/- 8.1 (SD). The median PSQI score was 6 (interquartile range 3 to 8). There were no statistically significant differences in PSQI scores between the 2 IOL groups (P = .65). This remained true after adjustment for sex, age, medication, and time since surgery.
Conclusion:
The blue-light-blocking IOL had no effect on the sleep quality of patients, indicating that these IOLs might serve as an alternative to conventional IOLs without a detrimental effect on circadian rhythm.
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