Objective Testing of Marijuana-Induced Vision Changes
Abstract
Nine vision functions were measured by objective methods in a study sample of 19 experienced, male, marijuana users who smoked a 0.8 gram natural marijuana cigarette containing 1.5 percent (12 milligrams) of delta-9- tetrahydrocannabinol. Placebo cigarettes were smoked as a control. The experiments were carried out double-blind with a cross-over design. Six related functions were also measured. Some of the subjects were also given 22 mg THC, alcohol, or Librium in separate experiments. The chief results are: (a) a reduction in glare recovery time with marijuana, (b) a decrease in intraocular pressure with marijuana, alcohol or Librium, (c) a deterioration of tracking eye movements with alcohol, (d) a rapid rise in pulse rate at the start of smoking marijuana followed by a rapid fall within minutes after smoking.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 30, 1973
- Accession Number
- ADA012831
Entities
People
- Anthony J. Adams
- Arthur Jampolsky
- Merton C. Flom
- Reese T. Jones