Comparing triggers to visual disturbances among individuals with positive vs negative experiences of hallucinogen-persisting perception disorder (HPPD) following LSD use.
American Journal on Addictions September 2017 Shaul Lev-Ran, Daniel Feingold, Craig Goodman et al.
Exploring differences in visual disturbances and triggers between Hallucinogen-Persisting-Perceptual-Disorder (HPPD) Type I ("positive/benign") and II ("negative/distressing"). Forty individuals with HPPD and prior LSD use completed clinical questionnaires. The most common type of visual disturbances among individuals with HPPD I and II was slow movement of still objects and trailing phenomena,...