I am an experienced pot user and have been smoking off and on for 40+ years. I took two moderate hits and within a short time I felt quite faint, had difficulty standing, and my eyes became seriously dilated causing everything to be seriously bright and a bit psychedelic. My eyes were so dilated that sitting under a dark tree and wearing sunglasses was not enough to make me feel comfortable. So I stayed sitting until I could function again which took 90 minutes to wear off enough that I could function. After maybe another hour I was back to normal. I discussed the various effects to my vision with my ophthalmologist and she said it must have been adulterated. She further told me THC alone cannot cause your pupils to dilate and that adulterated marijuana happens more often than one would think