Introducing GLARminŸ Tester

GLARminŸ Tester is the answer to the question many of you ask: Which blue blockers should I buy. It is eyewear (see below – fits also over prescription glasses) with 8 interchangeable blue light filters. It is simple to use: Find the filter that works best for you. Next, consult this table to find the closest matching blue light filter. Finally, click on the product’s link in the table to go to the vendor’s site and purchase whichever blue blocker you are after: glasses, screen protectors, flip-ups, fit-overs…

Blue light filter Tester S

Best blue light screen protectors

13 Blue light screen filters: Specs and Recommendations

You’d like a filter for your screen (phone, laptop, desktop, or tablet) that would protect you from blue light and glare. You’ve looked all over with no luck. But, there are many vendors offering screen protectors with impressive blue blocking claims: filters blue light up to 100%, or 90% blue light blockage and in smaller font: from 370nm to 420nm. What does that mean? It gets really confusing when you also find their claim of no color distortion because that is impossible you can’t block blue light and see it too!?!

In fact it is not easy to find good screen protectors that do filter considerable proportion of blue light, with no sales tricks, just plain and straightforward data. It’s disappointing, but there is little contest for the best anti-blue light screen filter. Could it be that there are only #two that live up to its promises!? … Unless, you’d be happy with a DIY solution!?

Below is a review of 13 brands that claim blue blocking properties of their screen protectors. You’ll also find spectrograms (where available) with corresponding recommendations about filters’ suitability for different blue light associated conditions.

Continue reading →


Central serous retinopathy (CSR), Photophobia and Blue light

This post might help you if have central serous retinopathy (CSR), sometimes also referred to as central serous choroidopathy (CSC). Because of CSR Sam (the name has been changed) had severe problems with light sensitivity to computer screens and fluorescent lights (but not other sources of light). He found relief in filtering blue light.

If you also suffer from central serous retinopathy and have issues with glare do drop a comment below, for the benefit of others who are also struggling with CSR related light sensitivity. Let us know what has and what hasn’t worked for you!

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 giving” 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!

Here is what Sam’s message: Continue reading →

Increasing Eye Comfort for Writers, Editors, and Others Who Work in Intensive Text Environments

Guest post by Margaret Copeley, MEd


Many people must spend virtually their entire work day at a computer. In addition, many of us spend several more hours using a computer for personal activities: email, shopping, researching topics of interest, and so on. As a freelance writer and editor I found that Computer Vision Syndrome crept up on me over a period of a couple of years after about ten years of very intensive computer use. My eyes were very dry and burning; my vision was blurry; I had constant headaches; I became very sensitive to light both indoors and outdoors. My discomfort and poor vision became so severe that I really wondered if I could continue in my work. That was a sobering thought, and it motivated me to learn as much as I could about my eyesight and how it is affected by a computer.

In this article I will describe some strategies that can make a significant difference in eye comfort for writers, editors, and others who work mostly on a computer with an emphasis on customizing Microsoft Word for maximum clarity and comfort. Continue reading →


Best blue blockers in style and light filter specs

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. Continue reading →

blue light filter color distortion

Blue light blockers and color distortion: Could there be none?

Saying that “blue light blockers don’t distort color” is manipulation used to convince uninformed people to buy products that filter blue light, but not much and not any more than it filters the rest of visible light spectrum. But to prevent or mitigate eye strain, glare, insomnia, etc. a filter should block either most blue light or considerably more blue light than it blocks other, longer wavelengths of visible light. Such a blue light filter necessarily distorts color!

With the help of a few spectrograms you’ll see below why it is possible to say deceivingly – but without lying – that blue blockers don’t distort color.

Continue reading →

How to reduce eye strain headache from fluorescent lights

Office lighting and screen glare frequently cause computer eye strain headache, computer use in offices with LED and fluorescent lighting in particular. The light sensitive and those with fluorescent light sensitivity are particularly vulnerable as their problems appear to have the same cause: disproportionately high blue light content emitted by LED and fluorescent lights. This post draws from vision and work ergonomics science to suggest ways to reduce LED and fluorescent light headaches with five different types of blue filtering glare screens.

Continue reading →