A study involving normal participants found no observed difference in sleep quality .
We found no studies investigating effects on macular structure or function .
We find a lack of high quality evidence to support using BB spectacle lenses for the general population to improve visual performance or sleep quality , alleviate eye fatigue or conserve macular health
PURPOSE Blue-blocking ( BB ) spectacle lenses , which attenuate short-wavelength light , are being marketed to alleviate eyestrain and discomfort when using digital devices , improve sleep quality and potentially confer protection from retinal phototoxicity .
The aim of this review was to investigate the relative benefits and potential harms of these lenses .
Attenuating Photostress and Glare Disability in Pseudophakic Patients through the Addition of a Short-Wave Absorbing Filter
To evaluate the effects of filtering short wavelength light on visual performance under intense light conditions among pseudophakic patients previously implanted with a clear intraocular lens ( IOL ) .  This was a patient-masked , r and omized crossover study conducted at 6 clinical sites in the United States between September 2013 and January 2014 . One hundred fifty-four bilaterally pseudophakic patients were recruited .  Photostress recovery time and glare disability thresholds were measured with clip-on blue-light-filtering and placebo ( clear ; no blue-light filtration ) glasses worn over patients ' habitual correction . Photostress recovery time was quantified as the time necessary to regain sight of a grating target after intense light exposure . Glare disability threshold was assessed as the intensity of a white-light annulus necessary to obscure a central target . The order of filter used and test eye were r and omized across patients . Photostress recovery time and glare disability thresholds were significantly improved ( both P < 0.0001 ) when patients used blue-light-filtering glasses compared with clear , nonfiltering glasses . Compared with a nonfiltering placebo , adding a clip-on blue-absorbing filter to the glasses of pseudophakic patients implanted with clear IOLs significantly increased their ability to cope with glare and to recover normal viewing after an intensive photostress . This result implies that IOL design s with blue-light-filtering characteristics may be beneficial under intense light conditions
A study involving normal participants found no observed difference in sleep quality .
We found no studies investigating effects on macular structure or function .
We find a lack of high quality evidence to support using BB spectacle lenses for the general population to improve visual performance or sleep quality , alleviate eye fatigue or conserve macular health
PURPOSE Blue-blocking ( BB ) spectacle lenses , which attenuate short-wavelength light , are being marketed to alleviate eyestrain and discomfort when using digital devices , improve sleep quality and potentially confer protection from retinal phototoxicity .
The aim of this review was to investigate the relative benefits and potential harms of these lenses .