Or you could save yourself some cash and install a bluelight filter on your computer like f.lux
It serves the same purpose, blocking the blue lightwaves that cause discomfort, and you don't need to wear it on your face.
ElectricCoffeeBeing one with very sensitive eyes, I installed flux a ways back, and it was alright. However, for me at least, the difference that these make over flux is massive. They're particularly good when you work somewhere where you go among different screens and workstations, as you obviously can't bring flux with you. I use both flux and the Gunnars at work, but can't use flux at home for games as it causes minor input delay for me. I very much recommend these for anyone who has used flux, and is looking for something better.
ElectricCoffeeRight, but even so these glasses are designed to alleviate strain from looking at a computer screen for prolonged amounts of time, not really the same as regular glasses where the only focus(no pun intended) is on focusing.