I was diagnosed with a complex meningioma in 2005. Had surgery at the Barrow Neurological Institute followed by cyberknife treatments. The course of treatment worked well although over the years I have had some deterioration in my visual field in one eye and hearing loss (now profound) in the ear on the same side. This is considered the result of the cyberknife radiation treatment rather than any tumor regrowth.
I too had some pretty strange visual after-effects from the surgery & cyberknife which lasted about 6-8 weeks but did in the end resolve. I also had to take steroids for a number of weeks during my recovery period to stave off inflammation.
Hope this info helps...
treatment & recovery are inconvenient but things do smoothe out. Oh, additionally in my case I had (expected) short term memory loss problems that took me at least 6 months to resolve.