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by bicubic 2676 days ago
It doesn't. Eye fatigue is caused by being focused on the same depth for prolonged periods of time. That fixed depth being slightly closer or further away changes very little.

Having a habit of regularly looking away from your monitor and focusing on a distant object negates it. When doing prolonged microscopy work, we were trained to take a break every 30 min and focus on something very close, then focus on something far, back and forth, several times.