Blue-light-blocking intraocular lens implantation improves the sleep quality of cataract patients.
OBJECTIVE
To evaluate whether blue-light-blocking intraocular lens implantation affects the sleep quality of cataract patients.


METHODS
Pre-test/post-test experiment.


METHODS
N/A.


METHODS
40 patients having bilateral cataracts with level higher than N3 (LOCS II) nucleus hardness, including 26 females (65%) and 14 males (35%).


METHODS
Cataract phacoemulsification followed by blue-light-blocking intraocular lens (IOLs, SN60WF, Alcon Laboratories, USA) implantation.


RESULTS
Patients were contacted in site before cataract surgery and followed by telephone at least 2 months later after second-eye surgery. Pittsburgh Sleep Quality Index (PSQI) questionnaires were administered to evaluate sleep quality. Median age of patients was 74 years (IQR 70 to 78). The median PSQI globe scores were 7 before surgery and 4 after surgery (Z = -2.121, p = 0.037). More specifically, there were significant differences on subjective sleep quality (Z = -2.064, p = 0.045), sleep duration (Z = -2.037, p = 0.047) and daytime dysfunction (Z = -2.142, p = 0.034) when compared between before and after surgeries. The ratio of poor sleepers (PSQI > 5) was reduced significantly after surgery (χ² = 14.532, p < 0.001).


CONCLUSIONS
Blue-light-blocking IOL had a significantly beneficial effect on the sleep quality of cataract patients.
Department of Ophthalmology, Ophthalmic laboratory of Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China.
Xin
X
Wei
Chunyan
C
She
Danian
D
Chen
Fangbing
F
Yan
Jihong
J
Zeng
Liping
L
Zeng
Lin
L
Wang
D000368:Aged; D002681:China; D002940:Circadian Rhythm / Q000502:physiology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007407:Interviews as Topic; D019654:Lens Implantation, Intraocular / Q000379:methods*; D007910:Lenses, Intraocular / Q000706:statistics & numerical data*; D008027:Light; D008297:Male; D018918:Phacoemulsification / Q000379:methods*; D011474:Prosthesis Design; D012890:Sleep / Q000502:physiology*; D011795:Surveys and Questionnaires
IOL; PSQI; Sleep quality; blue light; cataract