Double vision

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Double vision is defined as the experience of seeing duplicated vision[1][2], similar to that which occurs when one crosses their eyes. Depending on the intensity, this effect can result in a reduced ability to function and perform basic tasks which necessitate the use of sight.

The effect can easily be suppressed by closing one eye. This suggests that double vision may occur when the brain overlays the data received from both eyes on top of each other incorrectly, without merging the information into a singular 3-dimensional image as it normally would during everyday life.

This effect is capable of manifesting across the 3 different levels of intensity described below:

  1. Subtle - At the lowest level, double vision is subtle and mostly ignorable in a manner which, although obviously present, is still not intense enough to render the person incapable of perceiving visual details necessary for tasks such as reading text or crossing a busy street.
  2. Distinct - At this level, double vision becomes intense enough to result in extreme difficulty performing tasks which require the perception of fine details, such as reading. However, the perception of large-scale details such as the person's general environment tends to remain readily perceivable with both eyes open.
  3. Intense - At the highest level, double vision becomes so intense that the person will no longer be able to accurately perceive small and large-scale visual details of their environment. This will necessitate that the person closes one of their eyes at all time in order to function as they would sober.

Double vision is often accompanied by other coinciding effects such as acuity suppression and pattern recognition suppression. This effect is most commonly induced under the influence of moderate dosages of depressant and dissociative compounds, such as alcohol, quetiapine, ketamine, and DXM.[3] However, it can also occur much less consistently under a wide range of other classes of compounds such as hallucinogens, stimulants, anticholingerics, SSRI's, opioids, GABAergics, and cannabinoids.

Image examples

 Caption
4-MeO-PCP
Ketamine
PCE
MDMA
Diphenidine
Dextromethorphan
O-PCE
Datura
Double vision.jpgDesktop double vision by Chelsea Morgan
3-MMC
2-Fluorodeschloroketamine
Experience:30mg (smoked) DMT - The Monolith
Methoxphenidine
3-MeO-PCE
Memantine
Heroin
Lisdexamfetamine
Experience:2mg 25C-NBOMe - Experimental trip to test personal limits of NBOMes
Opioids
Experience:40mg Zolpidem / 20mg Diazepam - Please Don't Do This
Substance overdose
Nitrous
Codeine
Experience:25mg Deschloroketamine - My first time orally dosing DCK
Amanita muscaria
Propylhexedrine
Zolpidem
Methaqualone
Experience:Datura Alcoholic Tincture
Acetylfentanyl
PMMA
Experience:60mg Zolpidem - A Delirious Adventure
Desomorphine
Fentanyl
GABAergic hallucinogens
Experience:A combination of DOC, 5-MAPB, 5-MeO-DMT, ETH-LAD, Cannabis, Pentedrone
Double vision by arnold lane.jpgDouble vision on a fox by Arnold Layne
Experience:2mg Etizolam & N20 - "Hippy Crack" Indeed
Benzydamine
Experience:700mg - To the dextroverse.
3-MeO-PCMo
MDEA
Ephenidine
Dihydrocodeine
VisualFlanging2.pngDouble vision at a desk by Anonymous
ExistingEntity/TestingSpace
3-HO-PCP
3,4-CTMP
Experience:Ephenidine:185mg - A Weird and Rewarding Trip
PCP
Experience: 105mg Ephenidine - An Intense Emotional Experience
Methoxetamine
Experience:260 mg Ketamine (insufflated) - Lost in Paisley
Methamphetamine
Kratom
Deschloroketamine
Diphenhydramine
Myristicin
Morphine
PMA
3-MeO-PCP
Alcohol
Double vision pc by arnold lane.jpgDouble vision on a PC by Arnold Layne
Visualflanging.pngDouble vision in a kitchen by Anonymous
Experience:LSA (20 HWBR seeds) – A pleasant adventure with a harsh body load

Psychoactive substances

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

Experience reports

Annectdotal reports which describe this effect with our experience index include:

See also

External links

References

  1. What Is Double Vision? | https://www.webmd.com/eye-health/double-vision-diplopia-causes-symptoms-diagnosis-treatment#1
  2. Marsh, A. (1979). "Visual Hallucinations During Hallucinogenic Experience and Schizophrenia". Schizophrenia Bulletin. 5 (4): 627–630. doi:10.1093/schbul/5.4.627. ISSN 0586-7614. 
  3. B.Sc., Joanne L. Smith; Buncic, J. Raymond (2018). "Drugs Which Can Affect near Vision: A Useful List". American Orthoptic Journal. 49 (1): 180–190. doi:10.1080/0065955X.1999.11982210. ISSN 0065-955X.