Um optometrista explica a Ars Technica porque estes não são apenas hype ou efeito placebo:
The tints are pretty standard in the optical community. The advantages stated are all true... they haven't reinvented the wheel, so to speak," she explains. The amber tint is going to increase contrast when looking at computer or television screens, and the anti-reflective coating will also help. Anderson says that should help you "get back 8-10 percent of the 12 percent of usable light that we lose to glare, when worn in front of a light-emitting source such as a computer or oncoming headlights.
Alguns depoimentos de um tópico no Hacker News :
I have a pair of Gunnar Optiks (http://www.gunnars.com/) that I LOVE.
I used to have ridiculous eye strain when staring at the computer screen for hours, but after getting a pair it's all but gone away... after using them for close to a year, I can honestly say they have made a great impact on my ability to do work. I'd highly recommend that anyone who hasn't and has issues with eye strain give them a try.
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Agree on Gunnars - ever since I started using them (about 2 months ago) my eyes are not nearly as much tired at the end of the day as they used to be. Also, no more headaches.
I was also very skeptical about them, however something had to be done about all the pain I had after using computer for 8-10 hours.