IOL implantation improves sleep quality

Article

Removal of a cataract and implantation of an intraocular lens (IOL) improves overall sleep quality and sleep latency, according to a study published online before print.

Removal of a cataract and implantation of an intraocular lens (IOL) improves overall sleep quality and sleep latency, according to a study published online before print in Investigative Ophthalmology and Visual Science.

Researchers in the UK were seeking information on how the melanopsin-based photosensitive retinal ganglion cells (pRGC's) regulate sleep/wake timing in patients who have cataracts. They used the Pittsburgh Sleep Quality Index (PSQI) to assess quality of sleep in 961 patients undergoing cataract surgery. The patients received either an ultraviolet blocking (UVB) clear IOL (498 patients) or a blue-filtering (BF) IOL (463 patients). The patients completed the PSQI questionnaires 1 month preoperatively and 1, 6 (UVB-IOL patients only) and 12 months postoperatively.

The researchers found that cataract removal - regardless of the type of IOL implanted - improved overall sleep quality significantly 1 month postoperatively. Sleep latency (the shortening in time to fall asleep) also improved, and the improvement was sustained at 6 and 12 months postoperatively.

"The key finding of this study is the sustained improvement in sleep latency after surgery irrespective of IOL type implanted. This result highlights a significant benefit of cataract surgery in addition to improvement in visual acuity," the researchers wrote.

To read the full study, visit the journal's website.

Newsletter

Join ophthalmologists across Europe—sign up for exclusive updates and innovations in surgical techniques and clinical care.

Recent Videos
Christine Curcio, PhD, of the University of Alabama at Birmingham Heersink School of Medicine, shares histology update and revised nomenclature for OCT with Sheryl Stevenson of the Eye Care Network and Ophthalmology Times
SriniVas R. Sadda, MD, FARVO, shares key points from his retina presentation at the International SPECTRALIS Symposium
Robert Sergott, MD, describes fluorescence lifetime imaging ophthalmoscopy (FLIO) and the International SPECTRALIS Symposium – And Beyond (ISS) in Heidelberg, Germany.
Rayaz Malik, MBChB, PhD, a professor of medicine at Weill Cornell Medicine - Qatar, spoke with Ophthalmology Times Europe about his presentation. It's titled "An eye on neurodegenerative diseases: Challenging the dogma" at the International SPECTRALIS Sympsoium. In conversation with Hattie Hayes, Ophthalmology Times Europe
Anat Loewenstein, MD, describes her presentation on remote imaging for age-related macular degeneration and geographic atrophy at the International SPECTRALIS Symposium, in conversation with Hattie Hayes of Ophthalmology Times Europe
Tyson Brunstetter, OD, PhD, a US Navy Aerospace Optometrist at the NASA Johnson Space Center in Houston, Texas, shares key takeaways from his keynote at the International SPECTRALIS Symposium (ISS)
Rayaz Malik, MBChB, PhD, shares his presentation, titled An eye on neurodegenerative diseases: Challenging the dogma, at this year's International SPECTRALIS Symposium
At the Retina World Congress, Siegfried Priglinger, MD, speaks about ensuring the best outcomes for preschool-aged patients
At the 2025 ASCRS meeting, Robert Ang, MD said small aperture IOLs can benefit all patients, especially those with complex corneas or who have undergone previous corneal refractive surgery
Viha Vig, MBChB graduate student at the University of Auckland, New Zealand, discusses her poster presentation on the relationship between mitochondiral disease, Alzheimer disease, and other types of dementia.
© 2025 MJH Life Sciences

All rights reserved.