btw: I had optics several times.
Once, it was a Thai plant, back in the very late 80ees or very early 90ees, when it was hard to get some weed in germany (Mostly we smoked hash). It was all natural, no hybrid, well cured properbly because of its long distance transport in plastic bags on sea routes, because it was starting to get brown. It took you head-wise. We were watching this horror movie "the changeling", and when there was the (silly) szene with that ball jumping autonomiously up the stairs (5th minute ... lol) we had to stop the video tape and freaked out totally... had to go out for a walk
Second time I remember, I smoked sth that was sold as Northern Lights
I sat in the sun aside the dancefloor of a psychedlic trance party in day time, watching, and everthing started to get some "glare" around the contours...
And yes, take it orally in some butter cakes or cocoa milk for tripping. (Fat is important, because THC wont solute and be absorbed by your body in water!).
This was the third time with trippy optics: when we bobbled some mediocre hash into a McDonalds Cacao, on the go for the party. It was not even half a gramm for each of us. We all were fricking tripping seriously for hours ...
edit: excuse my bad spelling.... shame shame and too lazy to correct it ....