what effect does increased magnification have on the field of vision?

Answer 1

If you're talking about a lens in the shape of a contact: distortion or "pincushioning" of the center of your field of vision. It increases the peripheral range somwhat.

if youre talking about with a microscope: severe limitation of view range, and the item you are focusing on has much sharper focus, and you can see details of its surface...

Answer 2

I tried the same as an experiment
I actually watched the hImalayas, to scale, from distance of 3 inches,
Wow, all i could see was white.
In effect my field of vision got so chocked that I cought cold,
Today I am a man of vision working in the fields,
people lovingly call them feilds of vision.
and who knows what effect my fields have on them

Answer 3

because the retina contracts and tries desperately to adjust to the level of magnification, which it cannot bear....therefore vision becomes blurred.