No
Your vision works because you have to see the world and the world needs to see you
yes he had a vision of mary
No.
Fringe vision is basically peripheral vision, that which you see away from your line of sight.
I think its ok, depending on where you see it.
to see if the pulse rate is beating at a normal rate
Vision is always real, expect when blind, but your vision can deceive you. It can trick you. You can see something that's not really there. Or you can't see something that really is there.
seeing lines and dots in your vision
Peripheral vision (the part of vision that occurs outside the very center of gaze).
Visioneering... To 'create the vision, engineering the result of that vision'
It is usually easiest to find the brachial pulse under the bicep, in the arm. The carotid pulse can be a little tricky, but if you can see it, you can get the rate visually.