Best blue blockers in style and light filter specs

Best blue blocking computer glasses

This overview of blue light blocking glasses was motivated by complaints about the poor style among the good blue blockers. Truly, it is impossible to find brands of blue blocking glasses with a deep selection of frames, various blue blocking tints, disclosed spectral transmittance data, Anti-Reflective (AR) coating, and all of that available in prescription (Rx) for those who need it. But some vendors get very close! Hopefully this review broadens your options and helps you find the perfect blue blockers for your taste and blue light filtering needs.

To avoid subjective judgements style and lens’ effectiveness (in resolving specific problems associated with blue light) are not evaluated. We have different tastes, different issues with blue light, and different levels of sensitivity to blue light.

You know best what frame style looks good on you and what specific filter characteristics will help you combat your blue light problem (if you don’t feel comfortable deciding on what spectral transmission properties to choose see: How to pick the best blue filter for your light sensitivity problem). You might also consider our blue light filter Tester:

Blue light filter Tester S


What’s important is to have a high number of options to choose from, both in frame style and blue blocking characteristics.

Therefore, blue blockers’ frame style was evaluated based on the number of frames a given vendor or brand offers.

Similarly, blue blocking lenses were evaluated principally based on:

  • the number of different blue blocking lenses (with different spectral transmittances) offered by a vendor, and
  • the quality of spectral transmittancespecifications – the highest score in this category was given to those vendors that provide a spectrogram – the best and most transparent way of describing blue light filtering characteristics of a lens.

A more detailed research procedure and grading criteria are available at the bottom of this post.


Disclaimer: My interest in blue blockers comes from my problems with light sensitivity (photophobia), discomfort glare, and computer eye strain.

Disclosure: You can help sustain GLARminY – at no additional cost to you – by donating” a small percentage of anything you buy from Amazon by accessing Amazon here (commission link). Some links below are also commission links, as disclosed. Thanks!


Best blue blockers

Over 30 different brands of blue blockers were reviewed. If they provided absolutely no data on blue light filtering rate of their lenses, they were excluded from further study. Below is a table of the 15 that qualified.

Again, blue blocking effectiveness and style are not being judged by the scores below. The focus is on options provided both in blue blocking lenses and frame styles.

Pts Blue blockers vendor/brand Frame styles (fs) Tints Spectro- gram AR Rx Price Where to buy
33/36 Reading Glasses ETC 1000+ fs 7 tints Spgm Rx $29-294 Reading Glasses ETC (commission link)
22/36 Gunnar 25 fs 1 tint Spgm AR Rx $59-424 Gunnar, Amazon (commission links)
22/36 NoIR 6 fs 27 tints Spgm¹ $13-27 NoIR, Amazon (commission link)
21/36 Jins 1200 fs 2 tints Spgm 1/2 AR Rx $20-600 Jins, Amazon (commission link)
21/36 Spektrum 7 fs 2 tints Spgm AR $40-56 Spektrum, Amazon (comission link)
20/36 T’aime 9 fs 3 tints Spgm¹ AR  $99-125 T’aime, Amazon (commission link)
18/36 EDGE Safety Eyeware 15 fs 2 tints Spgm $5-50 Amazon (commission link)
14/36 Blue Block Glasses 3 fs 1 tint Spgm $22-27 Blue Block Glasses
13/36 Uvex (safety eyeware) 11 fs 2 tints Spgm² $7-50 Amazon (commission link)
13/36 LowBlueLights 8 fs 1 tint Spgm¹ $60-80 LowBlueLights
12/36 Spectra 479 1 fs 1 tint Spgm $30-50s Amazon (commission link)
11/36 Gamma Ray Optics 21 fs 1 tint Spgm² $8-50 Amazon (commission link)
8/36 Prisma by Innovative Eyewear 5 fs 2 tints €63-139 Innovative Eyewear
7/36 Melatonin Shades 1 fs 1 tint Spgm² $50 Melatonin Shades, Amazon (commission link)
6/36 Carbonshade 4 fs 1 tint $129 Carbonshade, Amazon (commission link)
¹ Spectrogram(s) provided upon request.
² Spectrogram(s) available on 3rd party web sites.

Blue light blocking sunglasses and outdoors tints were excluded from this review and will be evaluated in a separate article (a considerable selection of blue blocking sunglasses may be found in this post).

This overview of blue blocking glasses might motivate their vendors to improve the data they share. So Like, Share, Reblog, etc. to make it known that we care about spectral transmission data of blue blockers we buy.


Blue light filtering specs and more


1st: Reading Glasses ETC (33/36pts)


Reading Glasses Etc. (commission link) is an online optical shop with the best selection of blue blockers both in terms of number of frame styles offered (over 1000) and in terms of the quality of spectral transmission information on their blue blocking lenses.

Each of the 7 blue blocking lens tints they offer is accompanied by a spectral transmission curve, an estimate of the percentage of blue light filtered and –uniquely in the blue light filtering market- the Wertheim Factor, a proposed standard for comparing blue light filters.

Blue blocking lenses by Reading Glasses Etc. are available with Anti-Reflective (AR) coating, or with tint, as plano/zero power, reading powers, or single vision prescription.

Blue light filtered: 42%, 44%, 48%, 59%, 66%, 74%, 81%

Click on images to enlarge. Source: Reading Glasses Etc.

Buy these blue blockers from Reading Glasses Etc. (commission link). See also their budget blue blockers for $29 (commission link).

5% discount for 1st time customers – promo code: RGEMOJO5 (use the link above – offered by ReadingGlassesETC upon seeing this post – update Oct 11, 2016)


2nd: NoIR and Gunnar (22/36pts)




NoIR Medical offers six different frames and by far the highest number of different lens tints with a “blue blocker protection” – 27!

Five of these tints are also labeled as GlareShields:

* the percentages (70%, 56%, 35%,…) refer to the visual light transmission of the lens (confirmed by NoIR in private correspondence).

Source: Private communication with NoIR

Buy NoIR blue blockers at NoIR Medical. See also their selection of blue blocking glasses on Amazon (links above).




Gunnars might be the best known brand of computer glasses. They offer 25 frame styles in one blue blocking tint that has been very carefully designed to block blue light in the range where digital screens emit it with high intensity (see below).

Blue light filtered: ~ 65%

Source: Gunnar, f.luxometer.

Buy Gunnars directly from Gunnar (commission link) or from Amazon (commission link).


4th: Jins and Spektrum (21/36pts)




Jins is another interesting brand of blue blockers with 1200 different frame styles and two blue blocking tints (unfortunately spectrogram is available only for JINS SCREEN lenses – see below, but not for JINS SCREEN NIGHT).

Blue light filtered: ~25% (JINS SCREEN), ~60% (JINS SCREEN NIGHT)



  • JINS SCREEN – cutoff at about 425nm, i.e. cuts most of blue light below 425nm – see spectrogram
  • JINS SCREEN NIGHT – brown lenses that block about 60% of blue light, filters near 100% of blue light below 480nm

Source: JINS, communication with Jins

Buy Jins blue blockers directly from Jins or from Amazon (commission link).


Spektrum ProSPEK


Spektrum ProSPEK blue blockers are available in seven different frame styles and two tints.

Blue light filtered:

  • ProSPEK-50 lens: 50% (yellowish lens with blue reflective coating)
  • ProSPEK-99 Elite lens: “up to 99%” (amber lens)

Spectrograms from: Spektrum. ProSPEK-50 lens, ProSPEK-99 Elite lens.

Buy Spektrum blue light blocking glasses at or at Amazon (commission link).


6th: T’aime (23/36pts)


T’aime (commission link) offers nine frame styles and three different lens tints all with no power added. They provided the images below to demonstrate blue blocking effectiveness of their lenses. The image on the left shows spectral power distribution (SPD) of light emitted by a computer screen (white background). Subsequent images show SPD of light passed through each of their three blue blocking lenses.

Blue light filtered: 97%, 95%, 85%

Click on images to enlarge. Source: communication with T’aime


The SPD diagrams show that:

  • the 97% blue light protection glasses block near 100% of blue light up to ~460nm, let through very little blue light between ~460 and 480nm and steeply increase transmittance beyond 480nm
  • the 95% blue block glasses let through a tiny bit more blue light below ~460nm (when compared to the 97% filter) and less light in the upper blue and green area (up to ~550nm)
  • the 85% blue blockers expectedly let through more blue light from 400 – 550nm

Buy T’aime blue light blocking glasses on Amazon (commission link).


after contacting T’aime to obtain their spectral transmission data, they offered to send their Dinodon blue light filter glasses which block 97% of blue light. See their review here.


7th: EDGE Eyewear (18/36pts)


EDGE Eyewear offers 15 different safety and sports frame style glasses with two different blue light filtering lenses suitable for indoors.

Blue light filtered:

  • yellow lens: at 80% visible light transmission blocks “low levels of blue light”
  • amber lens: at 57% visible light transmission blocks “medium levels of blue light” up to about 550nm

Spectrograms from EDGE Eyewear


Buy EDGE blue blockers on Amazon (commission links); or view only glasses with Yellow lens, or Amber lens.


8th: Blue Block Glasses (14/36pts)


Blue Block Glasses sells three different frame styles with orange tinted lenses (designed to help you control your sleep cycle). As you can see in the spectrograms below the tint of their lenses is very simillar and filters near 100% of blue light up to ~500-520nm.

Blue light filtered: near 100% (400-500nm), over 80% (500-550nm)


Buy Blue Block Glasses at their online store.


9th: Uvex and LowBlueLights (13/36pts




Uvex offers 11 different frames of their protective/sports eyewear with two blue blocking tints.

Blue light filtered:

  • SCT Orange – near 100% blue light blocked up to ~550nm with 45% visual light transmission (VLT). f.luxometer data is a bit conservative: cutoff at ~525nm but with VLT ~50%.
  • Amber – ~55% blue light blocked at 90% overall visible light transmission.

Sources: Uvex (pdf 798KB), f.luxometer

Buy Uvex eyewear on Amazon (commission links): SCT Orange lens, Amber lens.




LowBlueLights offers 8 frame styles with one (orange) tint designed to prevent sleeping disorders.

Blue light filtered: near 100%(up to about 535nm according to LowBlueLights spectrogram, up to about 500nm according to f.luxometer – see below).

Sources: LowBlueLights (as facilitated to potential clients via e-mail), f.luxometer

Buy LowBlueLights blue blocking glasses at their online store.


11th: Spectra 479 (12/36pts)


Designed to prevent sleep disruption Spectra 479 lenses are orange tinted and block near 100% blue light up to about 520nm. One frame style available (see above).

Blue light filtered: near 100% up to 500nm, ~90% (500-550nm – my estimate based on the spectrogram)


Click to enlarge. Source: Spectra 479


Buy the Spectra 479 on Amazon (commission link).


12th: Gamma Ray Optics (11/36pts)


Gamma Ray Optics offers 21 frame styles with one blue blocking tint.

Blue light filtered: ~ 30-35% (estimate over 400-500nm based on the spectrogram below)

Gamma Ray Optics doesn’t disclose spectral transmission data. They qualified for this review based on a spectrogram published by f.luxometer.



Gamma Rays may be bought at Amazon (commission link).


13th: Prisma by Innovative Eyewear (8/36pts)


Innovative Eyewear offers their blue light protection – PRISMA – glasses in five different frame styles and two blue blocking tints.

Blue light filtered:

  • LiTE lenses block ~92% (400-500nm) and ~50% (500-550nm)
  • PRO lenses filter ~99% (400-500nm) and ~80% (500-550nm)

Buy Prisma blue blockers at Innovative Eyewear shop (in German).


14th: Melatonin Shades (7/36pts)


Melatonin Shades were designed to reduce the risk of sleep disorders caused by blue light. They are available in one frame style and one tint (orange).

Blue light filtered: near 100% (400-500nm), ~80% (500-550nm); estimate based on the spectrogram below


Source: f.luxometer


Buy Melatonin Shades in their store or on Amazon (commission link).


15th: Carbonshade (6/36pts)


Carbonshade blue light filtering glasses are designed to prevent blue light induced sleep disorder.

They offer four frame styles with red-ish lenses that block near 100% of all wavelengths that suppress melatonin production.

Blue light filtered: near 100%(400-570nm)

Buy Carbonshade blue blockers from their online store or Amazon (commission link).


You were recommended blue blockers with:

  • Essilor’s Crizal Prevencia and/or Smart Blue Filter

  • Zeiss’ DuraVision BlueProtect

  • Nikon’s SeeCoat Blue Premium

  • Blue Control by Hoya

  • PFO Global’s iBlu Coat

  • BluTech

Essilor, Zeiss, Nikon, Hoya and PFO Global are big lens vendors with widespread distribution networks, so ophtalmologists, optometrists and optics often suggest one of their blue blocking lenses: Crizal PrevenciaSmart Blue Filter, DuraVision BlueProtect, SeeCoat Blue Premium, Blue Control, BluTech or iBlue Coat.

The spectrograms for their blue blocking lenses (with the exception of Hoya’s Blue Control) are available below.

Although in terms of spectral transmission there are some differences, Zeiss’ DuraVision BlueProtect, Nikon’s SeeCoat Blue Premium, PFO Global’s iBlu Coat and Essilor’s Crizal Prevencia and Smart Blue Filter all block very little blue light.

The blue blocking rate of these coatings is perhaps too modest to have a significant impact on your blue light related condition.

As such they could, perhaps, be recommended to people who don’t suffer any blue light related symptoms, but would like to filter a little blue light as preventive measure or to increase viewing comfort.

Although sold as clear, lenses with blue blocking coating also distort color. The distortion depends on the proportion of blue light they block.

Moreover, their lenses (Smart Blue Filter is an exception) have a coating that reflects blue light (as opposed to absorbing it in the case of tinted lenses). Under some circumstances (when worn outdoors) blue light deflecting lenses may concentrate and increase the amount of blue and UV light entering your eyes (see this 8 min video).


Crizal Prevencia and/or Smart Blue Filter  by Essilor


Blue light filtered: Crizal Prevencia ~20%, Smart Blue Filter ~20%, the two combined ~35%

Click on images to enlarge. Sources: Points de Vue (Crizal Prevencia) and Ontario Opticians (Smart Blue Filter)


Smart Blue Filter lens can be combined with Crizal Prevencia coating. The blue blocking rate goes up to about 35% (source).


DuraVision BlueProtect by Zeiss


Blue light filtered: 15 – 20% (estimate from the spectrogram below)


Source: Zeiss


SeeCoat Blue Premium by Nikon


Blue light filtered~35%


Source: Nikon


iBlu Coat by PFO Global


Blue light filtered: 10 – 15% (estimate from the spectrogram below)


Source: PFO Global

[Update, April 2017]

BluTech lenses



BluTech lenses filter about 20-30% of blue light.

Gunnar-Crizal Prevencia-BlueTech spectral transmittance curves compared

Source: Gunnar (private communication)


Closing remarks: Research procedure and grading criteria

The data for this overview was gathered in late August and September 2016. It consisted of online search of vendors that claim to sell blue light blocking glasses and a careful review of their websites and other sources.

The final list of 15 blue blockers consists only of those for which some information about glasses’ spectral transmission properties was found. A mere claim that certain glasses block blue light was insufficient. In some cases spectral data was obtained in direct communication with vendors.

I’d be happy to add more blue blockers to the list above. If you know of other good and stylish blue blocking glasses, please, write or comment below!If you are a vendor, please provide the information on:

  • the number of different tints
  • their spectral transmission info, particularly related to blue light
  • the number of frame styles offered
  • anti-reflective coating availability
  • do you offer blue blockers with prescription
  • the price range, and
  • a link to your website where this info is available.


Grading Blue blockers’ brands

The maximum number of points a blue blockers brand could obtain is 36 based on the:

  • number of frame styles; 1 frame style (fs): 1pt, 2-5fs: 3pts, 6-50fs: 5pts, 51-100fs: 7pts, 101-1000fs: 9pts, over 1000fs: 10pts
  • richness of spectral transmission data; spectrogram on vendor’s web site: 10pts, provided upon request: 7pts, provided by a 3rd party: 5pts, other limited data on blue light filter transmission, i.e. cutoff wavelengths or % of blue light blocked/transmitted, 2pts
  • number of different blue blocking tints with considerably different spectral transmission properties; 1 tint: 1pt, 2 tints: 3pts, 3 tints: 5pts, 4 tints: 7pts, 5 tints: 9pts, more than 5 tints 10pts
  • anti reflective (AR) coating availability: 3pts
  • availability of prescription (Rx) blue blockers: 3pts

Ps: If you find this post on good and stylish blue blockers useful, please consider LIKING, REBLOGGING, and/or SHARING it below.


29 thoughts on “Best blue blockers in style and light filter specs

  1. Hi, I have been researching for blue light computer glasses. I found your article very helpful. However, when I looked at how you rank the glasses vendor, I found one big flaw; it does not really tell people how good the blue-light lenses are.

    A vendor can have thousands of styles, put out spectrogram, with many tints, AR and prescriptions to get a full mark but can offer an extreme lousy blue-light protection. This won’t help consumer like me wanting to buy a good quality blue light protection glasses.

    You should add an true technical evaluation of their lenses offering. Dividing into 2 categories, light yellow tint vs. amber tint. Because naturally, amber will protect better yellow tint, but it will look awful. (e.g. Gunnar) You need to compare apple to apple and orange to orange.

    Then in each group, evaluate the % of protection for the most damaging wavelength between 420nm – 450nm and rate them according with 100 pts. This will provide a much better and informative review for people.

    Hope this help.

    1. John, thanks for your comment! I agree with you that there could be many more ways (perhaps better ones?) of evaluating computer glasses lenses. In the design of this overview, only objective measures relevant to number of styles and blue blocking characteristics of the lenses were chosen.

      Spectral transmission is the most objective way of comparing blue-blocking characteristics of different filters (computer glasses). It is also what makes all the differences in preventing blue light associated conditions.

      Tint is, unfortunately, not as objective.

      Would it be helpful if in the review of the article, a column suggesting the tint would be added? I understand there are people who also weigh the look/color of the lens in addition to its light filtering characteristics.

      Thanks again and best,

      1. Hi Uroš , as you have mentioned, tint is not objective. There are different tints. The main one would be light yellow and amber.. That will give people some ideas. However, as mentioned, the more objective test would be based on the spectrogram. Once you can somehow classify them into the different tint group, then measure the block % from 420nm-450nm.

      2. John, thanks for your suggestions!

        I forgot to mention the classification of blue light filters in this table (however, it lists all different filters in addition to glasses, moreover, the classification is only based on transmission). See if you find it useful.

  2. Great information. I have suffered various amounts of photophobia my entire life, sometimes associated with headaches. I spend a lot of my day in front of a screen or two or three. I just got a new iPad Pro and today changed the screen to utilize their built in blue light protection. I felt some immediate relief but don’t know if it is enough. I wear trifocals regularly, also have prescription computer glasses, I’m wondering if any of the companies you have listed have clip-ons? I’ve seen them from one company, but am not sure if they would be adequate? Also, interestingly my optometrist who I have been seeing for years this year commented that my light blue eyes would put me at increased risk for I think night-time glare.

  3. Do Felix Grey glasses actually block blue light to a substantial extent? They claim to be transparent and to have no color distortion. On a similar note, are there any glasses that block/filter blue light but have no color distortion (e.g. have a yellow tinge)?

  4. Thanks for this post!
    In the case of Zennioptical would you suggest using their Beyond UV blue blocker clear lenses or suggest against using them if they might deflect UV?
    And what is the best option for UV blocking only (for plastic lenses)?

    1. I mean for day time clear lenses Rx glasses, mainly as a UV protection. If there are better alternatives for this I would be interested too.

      1. Mory, thanks.

        According to Zenni (see FAQ) BEYOND UVs don’t reflect UV and blue light but absorb it:

        BEYOND UV blue blockers from Zenni are made with a special blue-light blocking monomer ( from Mitsui Chemicals, a global leader in development and manufacturing of ophthalmic lens materials, that is directly incorporated into the lens. (…) By absorbing blue light, this monomer prevents blue light from passing through the lens to your eye.

        Based on this information I would say it is safe to say that you shouldn’t have problems with UV and Blue light reflecting from back lens surface back into your eyes. (I haven’t personally tried them, though – so we have to take their word for it).

        If you end up getting a pair, do let as know whether they reflect blue light or not! Or can anyone else out there comment on it?

        Unfortunately, I haven’t had a chance to study UV blocking technologies used by the different brands. However, with respect to your other choices for UV protection, you should be safe, as most lenses today block UV light up to 400nm (the UV400 label). But as you attentively noted, you need to also check whether they block UV through absorption or reflection – as done above with ZENNI’s BEYOND UVs.

        A comprehensive review/comparison of transmissions this type of lenses see the bottom part (near Filter 7) of this table.

        I hope that helps?

      2. Thanks Uroš Bole for the detailed answer.

        In the catalogue of the manufacturer they claim indeed for a full blocking via absorption until 420nn beyond the 400n blocking standart. Now how critical is this extra blocking of 400-420nn? Although It’s not relevant to LED light or sleep problems is it still so valuable for the eye’s health?

      3. Mory, hi again.

        Yesterday I forgot to include a link to a spectrogram to BEYOND UVs (that they sent to another visitor to this site) – in case you find it useful.

        To your question: That is hard to say. There seem to be no agreement within the scientific community.

        Also, it will depend for what issue you want to use blue blocking glasses. In addition to the ones you mention it might be:

        for AMD, until research is more conclusive on what wavelengths are harmful, I would play it safe and try to find glasses that block wavelengths at least up to 460nm. Following this rationale, a cutoff at 420nm (as in the case of BEYOND UVs) is preferable to a cutoff at 400nm.

        for visual comfort – to reduce eye strain, that is very subjective, because among many other things (which largely happen in our brain – and are not well researched yet), it depends on how much blue light your macular pigment blocks. That varies a lot from person to person. Many people report relief in digital screen based tasks even with weaker blue blockers than BEYOND UVs. Perhaps they are the majority (I am guessing based on what type of blue blockers seem to be most massively sold in the market – I have no data for this). But there are others who need a cutoff at 550nm or even beyond.

        Personally, I’d take the extra 20nm of blockage. But you may have other issues (unknown to me) in favor of other alternatives to BEYOND UV with a cutoff at 400nm!?

      4. Thanks for the detailed answer!
        For my (high) prescription it seems there’s no better alternative to Beyond UV so I’ll try them.
        Now when you talk about cutoffs fo AMD you talk about people with risk factors or as a general prevention?

      5. Mory, I am talking about those who were diagnosed with AMD and those who might have some risk factors, for example a parent who has/had AMD.

  5. This is a fantastic resource for blue blocking glasses, especially the spectral filtering information. I can only imagine the huge amount of time you put into compiling this. I am using it to select a glasses designed to prevent melatonin disruption before sleep. Thanks for providing this!

  6. Hi, great info, i wanted to ask about your opinion on Essilor Eyezen, i can only get either gunnars (which are about $300 in my country) or essilor, crizal, etc (the mainstream ones) i’m unable to get jins for instance, tried to order from reading glasses etc but there are power limits so in the end i couldn’t. I noticed smart blue filters out -20%, do you think i could get some releive for eye fatigue and dry eyes with eyezen? Thanks beforehand.

    1. wequendi, thanks for your question!

      I wish I could give you a plain answer, but I can’t :(. Each person vision is specific.

      Besides, I haven’t been able to find any spectral transmission data for Essilor Eyezen (except: filters at least 20% of Harmful Blue Light from their website. However, it is probably safe to assume that it is not too far from their other products: Crizal Prevencia, or Smart Blue Filter.

      – 20% is not very much (but I just had a case of a person who finds great relief with another brand of glasses that also filter such a minimal proportion of blue light!?). You could also assume that, if Essilor makes it, it is probably going to be helpful for a great majority of eyes. The trouble is, we don’t know if your eyes belong to that majority or not!?
      – what is “Harmful Blue Light”? Each vendor has their own interpretation of that ?!?

      In light of all these unknowns the only way to really know is to try it. But I understand that in your case trying it would cost you quite a lot of money, and you probably can’t return the glasses because they the lenses are tailored to you.

      Hence, for this type of cases I’ve been developing a Filter Tester:

      It is eyewear (that should also fit over regular glasses), with 8 interchangeable Filters. Each Filter blocks a different proportion of blue light – from very little – just a bit more than a regular, clear lens, to all blue light and more – up to 580nm!

      Hopefully it is ready by the end of this month – can you wait that long?

      It will be offered in exchange for what people can/want to give, we’ll see if that is sustainable. (To make the Tester and ship it costs US $10).

      (If interested subscribe to GLARminY to be notified when Filter Tester is ready).

      1. wequendi, thanks for this info and question!

        The spectral transmission of Seto Anti-Blue Ray lenses might be something similar to SeeCoat Blue Premium by Nikon (see spectrogram above) that also filters about 35% of blue light on that interval.

        It is one of the “no color distortion” options. Compared to other blue blockers, it is in the group of those that filter the smallest proportion of blue light (the next step down would be regular clear lens, that filters about 10%). Many big lens manufacturers produce blue blockers in this range, which may mean two things:
        (1) this type of glasses effectively help a lot of people (mentioned in my previous reply to your comment),
        (2) the manufacturers try to fulfill the ISO requirements for category 0 ophthalmic lenses, i.e., transmittance of visible light over 80% (the ISO 12312-1:2013 standard applies in the EU, other countries have similar standards.

        (Such international standards exist to ensure that spectacle lenses do not adversely affect the perception of colour (for example of traffic signals) and to ensure that suitable UV protection is offered to the eye. Recommendations are also given on limitations of the use of certain lenses that block more light (particularly blue light). For example, in night driving wearing of strong blue blockers is discouraged because our night (low-light) vision depends principally on blue light.)

        Anyhow, sorry about this long answer – it is not really a digression – I felt it was important to clarify why there might be so many blue blockers that filter relatively small proportion of blue light.

        But as always, the only way for you to know 100% if a blue blocking lens will help you, is to try it 🙁 … or at least to try a filter with similar spectral trasmission properties :).

    1. karthik: I don’t have first-hand experience with Crizal Prevencia lenses.

      However, it should be really easy for you to check. Take the glasses/lens, take it outside during the day (best if sunny). Hold the lens at arms-length and look at it from the back of the lens (as you would if looking through the glasses. Do you see a blue reflection on the surface of the lens? If you do, that is blue light reflected by the lens. Under the conditions described in the video you’ve mentioned the lens would also reflect blue light (and UV light) back into your eye when you wear them.

      I hope that was helpful!?

      1. Thanks for the reply. Have you heard of Tokai lutina lenses? It is a japanese company and is available in some countries. They claim that their lenses absorb 94% of blue light between 400 nm to 420 nm. What do you think of their lenses?

      2. Karthik: hi again.

        No, I hadn’t heard about Tokai Lutina lenses. But thanks a lot for bringing up the question!!

        Here is what you can deduce from the spectral transmission curve of Tokai Lutina lenses (source: Tokai Optical):

        It is certainly an improvement over regular lenses with a cutoff at 400nm, as shown on the graph above. No doubt those shortest visible wavelenghts carry most energy.

        But, sunlight blue light spectral power distribution (SPD) peaks at ~460nm (upper curve in the image below):

        It is therefore not surprising that to match the Sun’s SPD our macular pigment (natural blue light filter placed in the eye, right in front of the macula) peak absorbance is at ~460nm.

        (Note also, that our crystalline lens also helps to block a good proportion of blue light below ~420nm).

        Moreover, digital screens peak arround ~450-460nm:

        Now, if you go back to the Tokai Lutina lenses’ spectral transmission curve, you’ll see that at ~440nm its transmittance is above 90% (blocks only 10%) and above 95% by ~450nm. As such it hardly reduces the peak of blue light emitted by digital devices or the Sun.
        However, to reiterate, Tokai Lutina lens is certainly better than a regular clear lens, if you are choosing between these two.

  7. Thank you for such an informative and detailed post. I just ordered the amber Uvex using your Amazon commission link (they’re cheap, stylish, and 2 day shipping). If I don’t like them then I’ll try a more expensive brand. I’m desperate to get eye relief. I work behind a computer all day and I have serious eye pain nearly every day.

    1. Jeff, sorry to hear about your eye pain! I know it is a desperate situation. For quick relief I recommend How to reduce eye strain: Treatment with heat and cold. It helped me carry on with my work before I started figuring out all the things I write about here on GLARminY (now I don’t need to do the hot and cold treatment any longer :).

      Assuming you suspect that blue light has been causing your eye strain, your choice is reasonable. If you are right you are likely to feel immediate relief due to blue light reduction. Importantly, you’ll know blue light is your problem.

      After some time you might realize you are not completely comfortable with the glasses. This could be because they don’t have Anti-Reflective coating. Then you might be ready for blue blockers with AR.

      Also note that visual comfort for the more computer light* sensitive is a mosaic of many measures which reinforce each other. There are several more things you can do as described in the posts on GLARminY.
      *computer light: all light computer (digital screen) user’s eyes are exposed to independently of its source; light emitted by screens – focus on blue light; indirect glare and reflections from the screen and other surfaces in the field of vision; and ambient office/workstation lighting (artificial and natural)

      I hope blue blockers help you. Let us know how it’ll have gone! And thanks for your support!

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