Gunnars?

Crap, $99... :)

It slightly changes the color palette that you see. It may be less fatiguing, but hell, 100$? There is no magic in it, just coloured lense with filters. People report comfort issues, some say it just doesn't work on them. I would advise some testing before buying.

I didn't like the fact they made white look yellowish so I ended up not buying them. White light is eyestraining, sure, but I enjoy it anyway.

If computer use irritates your eyes then there are other things you need to consider first.
-If you have a LED monitor then you might be sensitive to PWM. There are LED monitors that do not use it. A monitor upgrade may be more expensive than those glasses but the glasses can't help you with PWM sensitivity.
-It's possible your monitor is too bright. Most people overestimate how bright a monitor needs to be and have theirs set at 100% which can be up to 3 times brighter than a CRT could do and very bad for your eyes.
-It's possible your monitor is poorly calibrated. A proper calibration requires a colorimeter/spectrometer and is probably not worth the cost to you. You can still do basic adjustments with this site that can help quite a lot.
-There is a flexible program out there that can adjust the colours of your monitor to something more comfortable.
-Other cause of tiredness are: you may be sitting too close to the monitor, the monitor may suffer from crosshatching, your stance on the desk may be poor, room lighting may cause glare especially if the monitor has a glossy screen, the monitor may have a very hazy coating.

Go download f.lux, it's free software that will adjust your screen's brightness depending on the time. Just Google it up, if it works for you (it sure did for me) it will save you a lot of money :)

99 dollars? Holy crap, that's an obvious rip-off. You could probably find a better solution somewhere with a different pair, or simply change the color pallete in your screen options.