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From what I've read, if you're going to be looking at something close to your face for long periods of times, you should take a break every now and then to alleviate the strain on your eyes. An recommended exercise is to focus on something far away, then something close, something at a distant, something close, etc.; doing this for a about a minute to help exercise the focusing mechanism of the eye. While I don't practise what I preach, there for a while I'd have significant eyestrain from focusing too close to my face for an extended period; you know, looking at a computer monitor 18" away for hours at a time, and I'd end up having really blurred vision at a distance for a few minutes after long sessions.
I've since upgraded to a MCPC hooked up to my 60" HD-TV, but the damage was done from too many years of close focus, so now I'm just a little near-sighted (have to wear glasses to surf the Internet on my TV or if I want the details to come out). Ah well, what's the use having them if you don't use & abuse them?
BTW I like the closet analogy, I had been wondering why some of my clothes have shrunk so much. Now I know it's just because they've been in there for a few years with little illumination & lack of air circulation!
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