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 .
D‐15 Performance with Short Wavelength Absorbing Filters in Normals
ABSTRACT Short wavelength absorbing filters ( SWAF 's ) have become very popular in the prescription and commercial sunglass markets . Like other chromatic filters SWAF 's have the potential to alter color vision . Performance on the Farnsworth Panel D‐15 ( D‐15 ) test was measured to determine whether any of 4 popular SWAF 's , in the form of sunglasses , produced color vision changes in 22 color normal adults . Using st and ard illuminant C , observers were tested under the following conditions : wearing no filter , a 1.0 log unit neutral density filter ( NDF ) , or one of the following SWAF 's : Corning CPF 550 ; NoIR Amber 40 % ; Blu Blocker ; and Vuarnet 4006 . In addition , the Vuarnets were tested outdoors in shaded daylight to determine the effects of increased illumination . The NDF served as the control and had no effect on D‐15 performance . Compared to it , only the Blu Blockers and Vuarnets affected D‐15 cap arrangements for these SWAF 's significantly . Blu Blocker error patterns had no predominant axis , whereas the predominant axis of errors in both Vuarnet conditions was tritan . Results of quantitative analysis performed on three factors confirmed these findings and indicated the Blu Blockers and Vuarnet SWAF 's caused moderate and moderate‐to‐severe levels of color confusion , respectively . Increasing the illumination level improved performance with the Vuarnets , but it remained significantly outside the normal range
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 .