New light for old eyes: comparing melanopsin-mediated non-visual benefits of blue-light and UV-blocking intraocular lenses

Abstract

Phacoemulsification, particularly first-eye surgery, has a strong positive effect on cognition and daytime alertness, regardless of IOL type.

The effect of blue‐blocking and neutral intraocular lenses on circadian photoentrainment and sleep one year after cataract surgery

“…This is in concordance with previous questionnaire-based studies (Ayaki et al 2013(Ayaki et al , 2014Wei et al 2013;Schmoll et al 2014) and on meta-analysis (ref review). Sleep efficiency increased significantly exclusively for participants allocated to blue-blocking IOLs and WASO decreased (improved) for the entire population.…”

Rejuvenation Effects of Cataract Surgery with Ultraviolet Blocking Intra-Ocular Lens on Circadian Rhythm and Gait Speed

“…Recently two investigators 41,42 reported that sleep quality significantly improved in cataract cases implanted with blue light-blocking IOLs, based on the survey with questionnaire, and their results supported our previous results with blue light-blocking IOLs. 4 In terms of the IOL color, a clear lens has greater light transmittance than a yellow-colored IOL and thus the effect on circadian rhythm synchronization may be stronger.…”

Ultraviolet or blue-filtering intraocular lenses: what is the evidence?

“…[17][18][19]66 Cataract surgery for the main part is carried out in an elderly population in whom there is an age-related decline in retinal photoreceptors and ganglion cell populations, as well as the function of the circadian clock, and with ageing smaller pupils. It is clear that access to light is important for this group.…”

“…17 It has already been shown in a number of studies that in addition to improving vision, cataract surgery has been shown to lead to an improved sleep-wake pattern. [17][18][19]66 This benefit is presumed due to the increased amount of light reaching the retina. Landers et al 66 carried out a cross-sectional study comparing the sleep quality of 31 individuals with UVB-IOL and 18 individuals with BFIOL.…”

“…15,16 There have been excellent comprehensive articles reviewing this subject in detail and a more recent metaanalysis by Zhu in 2012. [1][2][3][4][5] Since then more information has become available regarding the impact of the BFIOL on the sleep-wake cycle, 17,18 blood pressure, 19 mood, 20 and cognitive function 18 as well as early small studies looking at age-related macular degeneration (AMD) development. 21,22 Photoprotection and photoreception Transmittance and absorption properties of BFIOLs and UVFIOLs have been compared with each other, as well as to the natural crystalline lens.…”