Keeping the lighting appropriate for your screen(s) is the most important thing, along with positioning your screen(s) at about arm's length. I try to use bright pure white lightbulbs whenever possible.
After that, using a larger font is good (I use 16pt Inconsolata with Monokai theme for good contrast). I tried out those Gunnar computer glasses and they work pretty well (I got the clear lens ones), but I always forget to wear them.
After that, using a larger font is good (I use 16pt Inconsolata with Monokai theme for good contrast). I tried out those Gunnar computer glasses and they work pretty well (I got the clear lens ones), but I always forget to wear them.