Effect of a blue-light-blocking intraocular lens on the quality of sleep

Department of Ophthalmology, Repatriation General Hospital, Adelaide, Australia.
Journal of Cataract and Refractive Surgery (Impact Factor: 2.55). 02/2009; 35(1):83-8. DOI: 10.1016/j.jcrs.2008.10.015
Source: PubMed

ABSTRACT To evaluate whether implantation of a blue-light-blocking intraocular lens (IOL) affects sleep quality.
Repatriation General Hospital, Adelaide, Australia.
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.
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.
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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