Brightness alteration

Brightness alteration can be described as a distortion or change in the levels of brightness comprising one's vision. This usually results in one's vision becoming darker and gloomier, but could also potentially result in it becoming whiter and brighter.

Psychoactive substances

Compounds within our psychoactive substance index which may cause this effect include:

• Cannabis
• DXM & DPH in combination
• Diphenhydramine

See also

• Responsible use
• Hallucinogens
• Deliriants
• Subjective effects index
• Psychedelics - Subjective effects
• Dissociatives - Subjective effects
• Deliriants - Subjective effects