[ THIS BLUE LIGHT TESTER KIT IS NO LONGER AVAILABLE FOR PURCHASE.
The page is still available should you find useful information on it. ]

There’s only one way to know which blue light filter will work for you.

By doing a blue light test

Unfortunately, blue blocker testing has been an expensive process. In time and money, because:

Blue light filter test requires you to:
– try one, two, three, or more filters,
– each filter for hours, days, (sometimes) a week…
Until you find the filter that works for you.

Not easy to do. Unless you live near a low vision agency. One with lots of blue light filters to test for light sensitivity.

But here is the kicker:
Our Blue Light Test kit can guide you through the entire blue light filter shopping process.

BONUS: A FREE Blue blocker test for light sensitivity with an app (more below).

This is what our blue light filter Tester looks like:

It’s eyewear and 8 Filters with different blue blocking ranges.

Best part:
It also works if you wear prescription glasses. As over prescriptions!

Using it is simple:

1. Get the Blue Light Test kit:

– from GLARminY (€20, worldwide shipping included) – shipped out of EU (2-4 week delivery), or
– from Amazon.com (US$20) – shipped from USA

2. Do the Blue light sensitivity test – try the Filters one-by-one:

– if none of the 8 Filters works, that’s great news: Blue light is not causing your problems! You can look at other possible causes.
– but you are likely to find the Filter that really works for you. If so:

3. Order the most similar blue light filter: glasses, fit-overs, flip-ups, screen protectors. From this table.

That’s it!

User from the USA:
I just received the tester. Within 20 minutes, it was clear that the "0"s are the best for pain blocking, but my visual acuity is degraded, as expected.
I'd gone to some great neurologists and optometrists in California and paid a lot of money to try to solve my light sensitivity problem, with no success... I get your test kit and I get immediate relief. I should get a refund from the doctors and send it to you!

In case you want to know more, here is what follows:

– Research and experience on blue light testing
– Blue light sensitivity test – the old way
– Our Blue Light Filter Test kit
– Best way to test for light sensitivity
– How to shop for the best matching blue light filter
– Blue Light Test kit care & use instructions

“It is the wild, wild west … of blue light!”

Vendors often try to convince us that:

– Their blue light filter is the answer to your problem(s).
– Many use the bad blue light vs. good blue light argument.

Either way is an oversimplification (not based in research nor experience).

Now, here is what you find out as soon as you read more than one report (or promotional text) on the effects of blue light:

There is absolutely no agreement on what specific frequency or frequencies of light to attenuate, nor how far to attenuate said frequencies.

Further, every manufacturer seems to have their own particular interpretation of “blue light”, and how they choose to “manage” it varies wildly.

This is a quote by an optician. On a forum for eyecare professionals!

You might think: That’s from 2014.
But it’s just as true today! And likely for years to come.

Bottom line:
You can know what blue light filter works for you only if you test for light sensitivity.

User experiences confirm it (see here, here, and here).

And so do top vision scientists: “We still know too little to make predictions” [Measuring and using light in the melanopsin age. (2014)].

NOTE:
Blue light might not be your problem. Unlike most of us, some people actually need blue light for visual comfort!?
If you don’t find relief with any of the Blue Light Test Filters, you should look into other possible causes.

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Blue light sensitivity test (the old way)

The task of choosing the right blue light filter is overwhelming.

There are:

– many different blue blockers on the market,
– many different problems caused by blue light,
– more or less aggressive artificial lighting setups, and
– different ways people respond to light.

Bottom line:
If you buy one blue blocker and it works it’s a miracle.
(Without a light sensitivity test, of course).

TIP:
Always check the vendor's return policy before ordering a blue blocker.

Now, here is the good news:
Blue light sensitivity test works for any condition:

– visual discomfort
– computer eye strain
– dry eyes
– headaches
– eye strain from office lighting
– insomnia
– migraine
– benign essential blepharospasm (BEB)
– traumatic brain injury (TBI)
– photophobia/light sensitivity
– discomfort glare
– age-related macular degeneration (AMD)
– low visual acuity
– poor distance vision
– low contrast sensitivity
– etc..

Until recently, the two ways to test for light sensitivity were:

1. Buy a filter. See how it affects you. Keep or return.
2. Find a nearby ophthalmologist, optometrist, or a blindness/low vision agency. One that stocks and lends blue light filters for light sensitivity testing.

NOTE:
Your first impression of a blue light filter may be misleading. Some conditions (insomnia, migraines, AMD ...) need more testing time. Plan on trying each filter for a while.

Either blue blocker test option can help you find your perfect blue light filter. But they have important downsides:

– buying and returning blue light filters may be a long and stressful process,
– testing at an office/agency only works if you live close to one.

Our Blue Light Filter Test kit solves these drawbacks.

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The Blue Light Test kit

Our blue light filter test kit is eyewear (glasses or over-glasses) with a set of 8 blue light Filters.

Each Filter blocks a different range of blue light. From only a little to all blue light.

Also,
Below you can find links to 80+ blue blockers (glasses, over-glasses, screen protectors). All with known spectral transmission data.

User from the USA:
An amazing selection of filters!

The cardstock frame blocks out most of the unwanted, unfiltered light from the sides.

With an easy adjustment to the temple length, the blue light filter Tester fits larger and also small heads. For example, this 6-year old:

And, if you wear prescription glasses – No problem:

The Tester frame should fit over most prescription glasses. (The distance between the temples is 150mm = 5 ²⁹⁄₃₂ inches).

↑ Table of Contents ↑

The 8 Blue Blocker Test Filters

We selected 5 Tester blue light Filters based on:

spectral sensitivity of our photoreceptors for sharp vision;
peaks at ~530nm (M-cones) and ~560nm (L-cones) (click to view spectrograms)

spectral sensitivity of the photoreceptors responsible for sleep regulation (ipRGCs);
high sensitivity 480nm +/-50nm

blue blocking properties of macular pigment;
maximum near 460nm
important because of the widespread deficiency

LED spectral power distribution – most screens use LED technology:
high peak in the blue region – near 450nm

fluorescent light spectral power distribution;
peaks of blue light near 405nm, 435nm, and 490nm

TIP:
For more detailed info and references to scientific papers see this guide on choosing a blue light filter, and this article on indoor lighting and eye strain.

The remaining 3 Filters are like the 3 popular brands of blue blockers:

Gunnar – computer glasses

Axon Optics and TheraSpecs – light sensitivity, fluorescent light protection & migraine relief glasses (with the FL-41 tint).

This is how the blue light test Filters look like:

We mark them in the order from blocking more blue light (Number: 0) to blocking less (Number: 7).

User from the Czech Republic:
I have been testing the filters you sent me and I must say I notice a difference. Especially with Filters 2 and 3. I still feel some discomfort, but it doesn't develop into a migraine or stinging pain behind my eyes as it happens without the Tester. The world is also very nice in the cast of yellow. :)
I am surprised as this means the problem is definitely related to blue-light.
I will keep testing the different Filters and see how it goes. Filter 7, however, seems too weak for me so far.

Changing Filters is easy – through the opening at the top of the frame:

Here is Why we selected each of the Filters?
(to view spectrograms click below)

– Filter 0: filters/blocks light up to 580nm; That’s all the wavelengths that suppress sleep hormone production.

– Filter 1: blocks up to ~525nm (all blue light); should be enough to improve sleep – well above peak sensitivity for sleep hormone regulation (~480nm).

– Filter 2: cuts off at 490nm; just above peak sensitivity of sleep regulation; and comfortably above peak absorption of macular pigment (~460nm) and high blue light emissions of digital screens and energy saving (LED, fluorescent) lamps (~450nm); high transmittance at peak sensitivity of sharp vision (~530, ~560nm).

– Filter 3: cutoff at 460nm – at peak absorption of macular pigment; blocks 100% near the peak emission of LED lamps and digital screens (~450nm); allows plenty of light for the sharp vision photoreceptors (~530, ~560nm).

– Filter 4: like TheraSpecs migraine relief glasses (indoor FL-41 tint).

– Filter 5: like Gunnar computer glasses (amber tint).

– Filter 6: like Axon Optics’ migraine relief glasses (indoors FL-41 tint).

– Filter 7: cutoff at 400nm; 80+% transmission by 440nm and above; nearly clear – minimal color distortion – similar to blue blockers that claim no color distortion.

NOTE:
The Filters are similar (not identical) to the filters available in the market. The match is as good as specified in the table below. Similar filters produce the same therapeutic effect.

Use f.lux -the FREE blue light filter app- to do a rough blue light sensitivity test.

Test for light sensitivity at different CCT settings (from 1200K to 6500K). Until you find what feels the most comfortable.

Then, look for f.lux at xx00K in the tables above:
– to get an approximate idea of your blue light sensitivity,
– to know what blue light blocking glasses, over-glasses, or screen filters might work for you.

Ps: If you find the Blue light test useful, please consider LIKING, REBLOGGING, and/or SHARING it below.