ACCOMMODATION AND VERGENCE
Optometry and Vision Science – July 01, 1968
Source: OpenAlex
Summary
Psilocybin, a potent hallucinogen, profoundly impairs the brain's ability to correct visual perception, causing significant spatial distortion. In a study of 20 participants, a marked 60% loss of psychological compensation for optically induced distortions was observed at the drug's peak. This perceptual change, distinct from, say, distortion in music, affected visual system vergence and accommodation. Compensation returned as the drug course elapsed. This work advances optics, optometry, medicine, and psychology, revealing neurotransmitter receptor influence on behavior in psychedelics and drug studies.
Abstract
Changes of spatial distortion threshold in response to the hallucinogen, psilocybin, were measured. A marked loss of compensation for optically induced distortions at drug peak was found. Compensation returned as the drug course elapsed.