My order of the GUNNAR interceptor came. This is an actual customer review.
They were well wrapped in bubble wrap. The interceptors are a large frame, which is what I wanted as I didn't want to see the frame enclosing the display. Other GUNNARS can have smaller frames, which I now think will be OK as I have tried a similar (but less expensive pair of computer glasses from a generic Chinese manufacturer) pair on and can see the monitor fine but you do feel more enclosed. The GUNNARS do feel slightly better quality. The lens are plastic and therefore makes the glasses quite light weight which is good when wearing for hours. As mentioned before there is a slight prescription to them +0.25 (which GUNNAR doesnt tell you about) and this is why they probably help when looking at a screen a short distance away - this prescription is so slight it is hardly noticeable - the only way I knew was to hold some small print next to the screen that I would normally have trouble reading and the GUNNARS helped so that I could read it. Also as mentioned before from the youtube video there is meant to be a slight prismatic effect (dipupilar distance of 50mm rather than 65mm in our eyes) - this causes the eye sight to converge and focus on monitors etc a short distance away and has the effect of reducing the need for the muscles in our eyes to constantly cross your eyes (thus apparently further reducing eye strain). However as the lens are plastic the quality of the view is not as good as if it were made of glass. Overall I think that the glasses are actually slightly spoiling the view as compared to my naked eyes (however you should be getting the benefit of reducing eye strain due to the slight magnification/prescription and the prismatic effect).
Note that my eyes are now 50yrs old and although I do have a couple of prescription specs I don't wear them as my sight isn't too bad and distances of 0.5 to 3m should be OK for me.
Also regarding spoiling your vision - I did find that under all lighting conditions (lights on, lights off) that there was glare/reflections on the lenses. The glare seemed to glance across the front, penetrate through the lens, and some of the glare seems to have come in from behind (which should not really be possible).
The lens have a yellow tint. This is noticeable for the first 30 seconds - after that I rapidly got used to the colours and accepted it is normal. Note also that the yellow tint also seems to improve and make it easier to read text and differentiate between similar colours - up till now I liked my moniotr to be bright and white however I have heard that some people reduce the contrast and whitness on their monitors to reduce eye strain and improve the picture. These glasses do a similar thing and perhaps I should try adjusting my monitor without using the glasses. One major benefit of the glasses is to reduce the blue light that: can be harmful to your retina due to the high energy; and aparently it reduces chemicals in the brain that helps you sleep. As yayztwo cents said in his youtube review - we need to wit for 20 years before we will be able to tell if these glasses have protected the retina. As to the sleep thing, I havent really noticed anything major over the past 2 nights.
I have used them with a pair of Logitech and a pair of hyper x cloud II headphones and they are comfortable at first (for several hours) - with my logitech headphones one of my ears did start to get a little sore.
GUNNARS claims:
1 reduce eye strain
2 block blue light
3 sleep better
4 prevent dry eyes
5 reduce glare
After 2 days so far my initial feeling regarding the claims are:
1. yes it does reduce eye strain. After being at work I have come home and been on the computer for say 5 hours and normally my eyes would be getting tired but using these GUNNARS they were noticeably less tired. Also strangely when waking in the morning they also felt less tired and more moist/less dry.
2. block blue light - I cannot comment with any measurements but it does make things more yellow - which can help with reading bright text and sometimes to differentiate between colours etc
3. sleep better - I haven't noticed anything.
4. prevent dry eyes - yes surprisingly it does. Reading GUNNARS blurb wearing glasses basically stops wind blowing into the eyes and helps form a more humid atmosphere between in the air between the glasses and the eyes. You could wear any glasses to get this effect but it does seem to work.
5. reduce glare - it actually makes glare worse as compared to not wearing the glasses
other comments: wearing the glasses and headphones make you feel more cocooned and focussed on the screen and sounds - this was good. as mentioned in other posts you can now reduce blue light by buying a modern good quality monitor. Also modern good quality monitors also claim to reduce eye strain by reducing flicker form the back lighting (this is different from the refresh rate and response time). Instead of buying the GUNNARS you could save the money and put it towards a new/better monitor - however if you do then you may miss out on the reduced eye strain from the lens/prismatic effect, less dry eyes and being cocooned and will benefit from avoiding the glare that the glasses seemed to give me.
The youtube reviewers also seemed to like them in general but they do have their drawbacks. Overall however I will continue to wear them for the near term as I do seem to prefer them. If you do need prescription specs then I suspect that your own glasses could be superior as they: will help prevent dry eyes, and that your lenses made of glass is superior to these, and that you can get your lens coated to reduce blue light etc.
I will give it a couple of weeks and will post my findings again.