Is there any rules on how much visions enhencement can be put in a google or any vision reltated item?

It is my assumption that eye-wear operates under the same rule governing cyber-eyes. I have looked myself and found nothing that particularly explains it.

Still, you could always house-rule it; that seems to be what my group does most of the time. However, if anyone can mention some specific page numbers, I too would be very interested to know.

See the anniversary Errata. Goggles, glasses, binoculars, contact lenses etc. have been given Capacity, and enhancements take up the capacity.

There are also rules in Arsenal.

This superceeds Arsenal, and the rules found in Arsenal are pretty much only for adding visual enhancements to armor only.