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afree_account said:

The problem is, your eye is not a simple system.  It has much higher resolution at the center than surrounding it, which your mind compensates for by moving what you're looking at.  You can't simply read a page by taking a mental snapshot of it, your eyes have to follow the text.

 

Anyway, the best resolution of the eye is 0.3 arc-minutes (yes, it's measured in angles, not pixels).


If I remember correctly, 1 arc hour = 1 degree right?

If so 0.3 arc minutes is (1 degree/60)/3.33rec or 5X10^-3