Editing Glasses (section)

=== Blue-light blocking glasses ===
{{Main|Biological effects of high-energy visible light}}
By the end of the 2010s, eyeglasses that filter out [[Light spectrum|blue light]] from [[computers]], [[smartphones]] and [[Tablet computer|tablets]] are becoming increasingly popular in response to concerns about problems caused by blue light overexposure.<ref name="AAO-Computer-Glasses">{{Citation |last=Vimont |first=Celia |title=Are Computer Glasses Worth It? |date=27 April 2017 |url=https://www.aao.org/eye-health/tips-prevention/are-computer-glasses-worth-it |archive-url=https://web.archive.org/web/20200923163359/https://www.aao.org/eye-health/tips-prevention/are-computer-glasses-worth-it |others=Reviewed by Rahul Khurana, MD |publisher=[[American Academy of Ophthalmology]] |archive-date=23 September 2020 |url-status=live}}</ref><ref name=WebMD-Blue-Light-Glasses />
The problems claimed range from [[dry eyes]] to [[eye strain]], [[sleep cycle]] disruption, up to [[macular degeneration]] which can cause partial blindness.<ref name=AAO-Computer-Glasses /> They may also block out [[ultraviolet]] (UV) radiation. However, there is no measurable UV light from computer monitors.<ref name=AAO-Computer-Glasses /><ref>{{Citation |last1=Duarte |first1=IA |title=Ultraviolet radiation emitted by lamps, TVs, tablets and computers: are there risks for the population? |date=2015 |work=An Bras Dermatol |volume=90 |issue=4 |pages=595–7 |doi=10.1590/abd1806-4841.20153616 |pmc=4560556 |pmid=26375236 |last2=Mde F |first2=Hafner |last3=Malvestiti |first3=AA}}</ref>{{Contradictory inline|Glasses#Types}} The problem of [[computer vision syndrome]] (CVS) can result from focusing the eyes on a screen for long, continuous periods. Many times the glasses do not appear to have much of a tint, or, if any, a slight yellow tint, but they may be more heavily tinted.

Long hours of computer use (not blue light) may cause eye strain.<ref name="AAO-Computer-Glasses" /><ref name="AAO-Blue-Light">{{Citation |last=Porter |first=Daniel |title=Blue Light and Digital Eye Strain |date=16 January 2020 |url=https://www.aao.org/eye-health/tips-prevention/blue-light-digital-eye-strain |archive-url=https://web.archive.org/web/20201028103424/https://www.aao.org/eye-health/tips-prevention/blue-light-digital-eye-strain |others=Reviewed by Ninel Z Gregori, MD |publisher=[[American Academy of Ophthalmology]] |archive-date=28 October 2020 |url-status=live}}</ref><ref name="WebMD-Blue-Light-Glasses" /><ref>{{Citation |last=Iallonardo |first=Marisa |title=Do blue light glasses work ? |date=24 May 2020 |url=https://www.insider.com/do-blue-light-glasses-work |others=Reviewed by Benjamin Bert, MD |publisher=Business Insider}}</ref>
Many eye symptoms caused by computer use will lessen after the usage of the computer is stopped.<ref name="AAO-Computer-Glasses" />
Decreasing evening screen time and setting devices to night mode will improve sleep.<ref name="AAO-Blue-Light" /><ref>{{Citation |last=Hazanchuk |first=Vered |title=Should You Use Night Mode to Reduce Blue Light? |date=7 May 2019 |url=https://www.aao.org/eye-health/tips-prevention/should-you-use-night-mode-to-reduce-blue-light |archive-url=https://web.archive.org/web/20200908081841/https://www.aao.org/eye-health/tips-prevention/should-you-use-night-mode-to-reduce-blue-light |others=Reviewed by Raj K Maturi, MD |publisher=[[American Academy of Ophthalmology]] |archive-date=8 September 2020 |url-status=live}}</ref>
Several studies have shown that blue light from computers does not lead to eye diseases, including macular degeneration.<ref name="AAO-Blue-Light" /><ref>{{Citation |last=Porter |first=Daniel |title=Digital Devices and Your Eyes |date=15 November 2019 |url=https://www.aao.org/eye-health/tips-prevention/digital-devices-your-eyes |archive-url=https://web.archive.org/web/20200809234027/https://www.aao.org/eye-health/tips-prevention/digital-devices-your-eyes |others=Reviewed by Ninel Z Gregori, MD |publisher=[[American Academy of Ophthalmology]] |archive-date=9 August 2020 |url-status=live}}</ref><ref>{{Citation |last=Caporuscio |first=Jessica |title=Can blue light glasses prevent damage to eyes? |date=2 June 2020 |url=https://www.medicalnewstoday.com/articles/do-blue-light-glasses-work |work=[[Healthline|MedicalNewsToday]] |archive-url=https://web.archive.org/web/20201016101735/https://www.medicalnewstoday.com/articles/do-blue-light-glasses-work |others=Medically reviewed by Ann Marie Griff, O.D |archive-date=16 October 2020}}</ref> The total amount of light entering the eyes can be adjusted without glasses using the screen brightness settings. Similarly, the blue light can often specifically be adjusted using the "night mode" of different operating systems, which can usually be activated outside of nighttime hours.

{{anchor|VDU}}The [[American Academy of Ophthalmology]] (AAO) does not recommend special eyewear for computer use,<ref name=AAO-Computer-Glasses /><ref name="WebMD-Blue-Light-Glasses">{{Citation |title=Blue Light Glasses - Helpful or Just Hype? |date=16 December 2019 |url=https://www.webmd.com/eye-health/news/20191216/do-blue-light-glasses-work |work=WebMD Health News |archive-url=https://web.archive.org/web/20200807023240/https://www.webmd.com/eye-health/news/20191216/do-blue-light-glasses-work |archive-date=7 August 2020}}</ref>
although it recommends using [[prescription glasses]] measured specifically for computer screen distance (depending on individuals, but possibly 20–26 inches from the face), which are not the same as "blue-light blocking" glasses.<ref>{{Citation |last=Boyd |first=Kierstan |title=Computers, Digital Devices and Eye Strain |date=3 March 2020 |url=https://www.aao.org/eye-health/tips-prevention/computer-usage |archive-url=https://web.archive.org/web/20201003115848/https://www.aao.org/eye-health/tips-prevention/computer-usage |others=Reviewed by James M Huffman, MD |publisher=[[American Academy of Ophthalmology]] |archive-date=3 October 2020 |url-status=live}}</ref>
The position of the [[College of Optometrists]] (UK) is that "the best scientific evidence currently available does not support the use of blue-blocking spectacle lenses in the general population to improve visual performance, alleviate the symptoms of eye fatigue or visual discomfort, improve sleep quality or conserve macula health."<ref>{{Citation |title=Blue blocking spectacle lenses - The College's position on blue blocking spectacle lenses |url=https://www.college-optometrists.org/the-college/policy/position-statements/blue-blocking-spectacle-lenses.html |archive-url=https://web.archive.org/web/20200919122059/https://www.college-optometrists.org/the-college/policy/position-statements/blue-blocking-spectacle-lenses.html |access-date=24 October 2020 |archive-date=19 September 2020 |url-status=live}}</ref>