I don't know if we have enough scientific data to say how rare they are. My anecdotal experience (including my own as an individual afflicted by HPPD) makes me believe they are not as rare as is often suggested.
I don't know if we have enough scientific data to say how rare they are. My anecdotal experience (including my own as an individual afflicted by HPPD) makes me believe they are not as rare as is often suggested.