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Learn about HPPD and VS

Visual Snow and Hallucinogen Persisting Perception Disorder are characterized by the continual presence of sensory disturbances, most commonly visual.

Put your Pin on our Map

Our VS & HPPD Disease Maps allow researchers, doctors and patients to connect all over the world in order to provide support and catalyze vital research.

Register with the NRF

Join a worldwide database of those who suffer from VS/HPPD. You’ll provide important statistical information to our researchers and you’ll be able to see the doctors treating VS/HPPD in your area.



The Neurosensory Research Foundation (NRF) a non proft 501c(3) is comprised of individuals dedicated to unraveling the neurobiological underpinnings behind two relatively unknown, under-recognized yet prevalent neurological conditions — Visual Snow (VS) and Hallucinogen Persistent Perception Disorder (HPPD). The two neurological diseases share similarities in symptom complex, and with the proper resources in research, funding and advocacy, the NRF hopes to aid this desperately deserving patient pool. Education is key. A lack of proper physician training leads to a dearth of quantified VS and HPPD cases. In the end — many Physicians cannot identify VS or HPPD because they haven’t learned about the maladies. This leads to misdiagnosis, the prescription of ineffective and potentially harmful medicines, and the worsening of symptoms. A few of these cases lead to tragic outcomes. The NRF is here to shift the paradigm for those who suffer from VS or HPPD.

Misdiagnosis and What To Do About It

Visual snow(VS) and hallucinogen persisting perception disorder(HPPD) are relative newcomers in the medical scene. The conditions have probably been around for centuries, but the medical community is just now coming around to the idea that these diseases are entities...

HPPD Survey & Research Protocol Update

The Neurosensory Research Foundation having invested more than ten years in working toward the first in depth research protocol for HPPD is please to announce an inviation to participate in the LimeSurvey sponsored by Macquarie University and ICAN. Persons affected...

Neurosensory and Neuroregenerative Research Foundation Launches Website

Visual Snow and Hallucinogen Persisting Perception Disorder are debilitating conditions. The diseases live in the brain where wires are crossed when it comes to deciphering visual data. HPPD is brought on by the use of hallucinogenic drugs while Visual...