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[serpenttongue]

I consider their eyesight to be reasonable. My outdoor diamonds can see me coming from about 8 metres away and quickly pull their heads back into their boxes.

I would imagine that their eyes don't move much because they can view most of their surroundings while keeping the eyeball in a fixed position, but if you look carefully while holding a python you will see it's eyes move back and forth slightly as it tries to focus on objects.

If you look at their eyes close up while they're resting in their enclosure they usually wont move as a persons face staring at them closely tends to make them nervous, in which case they usually "freeze".