Over the last 4-6 months I've been getting a lot of headaches which\nare getting steadily worse. I'm now pretty sure they are due to\neyestrain caused by my excessive PC usage. I'm my own worst enemy in\nthis regard, spending 10-12 hours per day at my PC, 5-6 days per week,\nbut I'm addicted!\n\nI had an eye examination (all OK) and eyesight test leading to a small\nchange in the prescription of the glasses I use specifically for the\nPC.\n\nShort of the breaking out of this regime is there anything I can do by\nway of screen height, distance, posture, etc, to reduce the problem?\nAnd are there any exercises I can do to help my eyes recover from long\nperiods staring at a 24" widescreen LCD monitor from about 65 cm?\n\nIn case it's relevant, these headaches are almost always on one side\n(my left), and I'm wondering if I'm using the left eye significantly\nmore than the right? For instance, as I type this in my newsreader\nprogram, Agent, the text occupies less than a third of the screen, so\nI'm obviously looking leftwards.\n\nIs there any reason why an LCD screen should cause eyestrain more than\na CRT? My previous 19" CRT monitor, used just as much, didn't cause\nsuch serious headaches. I'd have expected the opposite, given the\ninherent flicker. Regarding that, there seems no way to change the\nrefresh rate (60 Hz) of this Iiyama monitor. But what does 'refresh\nrate' mean for an LCD/TFT screen anyway?\n\nAny advice would be much appreciated please.