Sounds like early stages of cannabis psychosis to me.

http://www.priory.com/psych/cannabis.htm

See you in the nuthouse
amberler Reviewed by amberler on . i'm seeing shit out of the corners of my vision i've been smoking quite a bit of weed lately and did some LSD two weeks ago. I'm sober now, and I kind of notice all kinds of crazy shit going on in the periphery of my vision. things seem to be breathing. does anyone have this? perhaps its just psychoschematic. my focused vision is fine, but like right now my bed is in the corner of my vision and it's "dancing". did I kind of fry my brain i guess? Rating: 5