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[[File:Tracers.jpg|thumbnail|300px|'''Tracers''' by '''[[User:TheReplicator|Chelsea Morgan]]''' - This image serves as an accurate portrayal of the commonly experienced [[psychedelic]] effect known as [[tracers]].]]
{{#ev:gfycat|https://giant.gfycat.com/EmbellishedAstonishingCurassow.webm|400x225|right|'''Tracers''' by '''[[User:Kaylee|Kaylee]]''' - This animation serves as an accurate portrayal of the commonly experienced [[psychedelic]] effect known as [[tracers]] (level 3).|frame}}
'''Tracers''' can be described as the experience of trails being left behind moving objects such as people, birds or cars in a manner that is similar to those found in long exposure photographs. They can manifest as exactly the same colour of the moving object which is producing it or can sometimes be a seemingly randomly selected colour of their own.  
'''Tracers''' are defined as the experience of trails of varying lengths and opacity being left behind moving objects in a manner that is similar to those found in long exposure photography.<ref name="DuboisVanRullen2011">{{cite journal|last1=Dubois|first1=Julien|last2=VanRullen|first2=Rufin|title=Visual Trails: Do the Doors of Perception Open Periodically?|journal=PLoS Biology|volume=9|issue=5|year=2011|pages=e1001056|issn=1545-7885|doi=10.1371/journal.pbio.1001056}}</ref> These can manifest as exactly the same colour of the moving object which is producing it or can sometimes be a randomly selected colour of their own.


A near consistent way to reproduce this visual effect is to move one's hand in front of their face or throw an object under the influence of a moderate dose of [[psychedelics]].
A relatively consistent way to reproduce this visual effect is to simply move one's hand in front of their face or throw an object under the influence of a moderate dose of [[psychedelic|psychedelics]].


Tracers can be broken down into 4 basic levels of visual intensity. These are defined below as:
This effect is capable of manifesting itself across the 4 different levels of intensity described below:


#'''Transparent''' - The most basic form of tracer can be described as an almost completely transparent after image which disappears quickly and drags shortly behind moving objects.  
#'''Subtle''' - At the lowest level, tracers can be described as an almost completely transparent after image which disappears quickly and drags closely behind moving objects.
#'''Translucent''' - At this level, tracers increase in their length to become at least roughly half as long as the distance across the visual field which the object it is following has moved. In terms of clarity, the tracers shift from barely visible to distinct and partially transparent in colour.
#'''Distinct''' - At this level, tracers increase in length to become roughly half as long as the distance across the visual field which the object it is following has travelled. The clarity of these tracers shifts from barely visible to distinct and partially transparent in colour.
#'''Opaque''' - At this level, tracers become completely solid in appearance and opaque in their colour with distinct and sharp edges to their shape which draw a clear contrast between the tracer itself and the background behind it. They become equal in length to the distance across the visual field which the object it is following has moved in and can remain in the air for up to several seconds.
#'''Intense''' - At this level, tracers become mostly solid in appearance and almost completely opaque with increasingly distinct and sharp edges. This creates a clear contrast between the tracer itself and the background behind it. The tracers become slower to fade from a person's vision and can remain in the air for up to several seconds. This results in longer trails covering the entire distance across the visual field which the object creating it has moved.
#'''All-encompassing''' - The highest level occurs at the point when a person’s visual field has become so sensitive to the creation of tracers that the entirety of it smudges and blurs into an all-encompassing tracer at the slightest movement of the eye. This can make it extremely difficult to see unless the eyes are kept still and the tracer remains in the air almost indefinitely or until one looks elsewhere within their visual field.
#'''All-encompassing''' - At the highest level, a person’s visual field has become so sensitive to the creation of tracers that it entirely smudges and blurs into an all-encompassing tracer at the slightest movement of an object or the eye. This can make it extremely difficult to see unless one's eyes are kept still in a motionless environment as tracers linger almost indefinitely or until one looks elsewhere within their visual field.


Tracers are often accompanied by other coinciding effects such as [[drifting]] and [[after images]]. They are most commonly induced under the influence of [[dosage#mild|mild]] [[dosage|dosages]] of [[psychedelic]]<ref>{{Citation | vauthors=((Abraham, H. D.)), ((Mccann, U. D.)), ((Ricaurte, G. A.)) | title=Psychedelic Drugs|journal=CiteSeerX|year=2002|url=http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.623.299}}</ref><ref name="O'Malley1972">{{cite journal|last1=O'Malley|first1=John E.|title=Trifluoperazine for The "Trailing" Phenomenon|journal=JAMA: The Journal of the American Medical Association|volume=220|issue=9|year=1972|pages=1244|issn=0098-7484|doi=10.1001/jama.1972.03200090066017}}</ref>  compounds, such as [[LSD]]<ref name="Abraham1983">{{cite journal|last1=Abraham|first1=Henry David|title=Visual Phenomenology of the LSD Flashback|journal=Archives of General Psychiatry|volume=40|issue=8|year=1983|pages=884|issn=0003-990X|doi=10.1001/archpsyc.1983.01790070074009}}</ref><ref name="AbrahamWolf1988">{{cite journal|last1=Abraham|first1=Henry D.|last2=Wolf|first2=Ernst|title=Visual function in past users of LSD: Psychophysical findings.|journal=Journal of Abnormal Psychology|volume=97|issue=4|year=1988|pages=443–447|issn=1939-1846|doi=10.1037/0021-843X.97.4.443}}</ref><ref name="Asher1971">{{cite journal|last1=Asher|first1=Harvey|title="Trailing" Phenomenon—A Long-Lasting LSD Side Effect|journal=American Journal of Psychiatry|volume=127|issue=9|year=1971|pages=1233–1234|issn=0002-953X|doi=10.1176/ajp.127.9.1233}}</ref><ref>{{cite journal |last1=Schwartz|first1=K.| journal=American Journal of Psychiatry | title=Nefazodone and visual side effects | volume=154 | issue=7 | pages=1038a–11038 | date=1997 | url=http://psychiatryonline.org/doi/abs/10.1176/ajp.154.7.1038a | doi=10.1176/ajp.154.7.1038a}}</ref>, [[psilocybin]], and [[mescaline]]. However, they can also occur less commonly under the influence of certain [[stimulants]] and [[dissociatives]] such as [[MDMA]] or [[3-MeO-PCP]].
====Image examples====
====Image examples====
{{Gallery|[[Effect::Tracers]]}}
{{Gallery|[[Effect::Tracers]][[Category:Replication]]}}
</onlyinclude>
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===Psychoactive substances===
===Psychoactive substances===
Compounds within our [[psychoactive substance index]] which may cause this effect include:
Compounds within our [[psychoactive substance index]] which may cause this effect include:
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*[[Dissociatives#Subjective_effects|Dissociatives - Subjective effects]]
*[[Dissociatives#Subjective_effects|Dissociatives - Subjective effects]]
*[[Deliriants#Subjective_effects|Deliriants - Subjective effects]]
*[[Deliriants#Subjective_effects|Deliriants - Subjective effects]]
[[Category:Visual]] [[Category:Distortion]] [[Category:Effect]]
===External Links===
[https://en.wikipedia.org/wiki/Palinopsia Palinopsia (Wikipedia)]
===References===
<references />
{{#set:Featured=true
{{#set:Featured=true
|Belongs to=Visual effects
|Belongs to=Visual effects
}}
}}
[[Category:Sensory]]
[[Category:Visual]]
[[Category:Distortion]]
[[Category:Effect]]

Latest revision as of 17:41, 20 May 2022

{{#ev:gfycat|https://giant.gfycat.com/EmbellishedAstonishingCurassow.webm%7C400x225%7Cright%7CTracers by Kaylee - This animation serves as an accurate portrayal of the commonly experienced psychedelic effect known as tracers (level 3).|frame}} Tracers are defined as the experience of trails of varying lengths and opacity being left behind moving objects in a manner that is similar to those found in long exposure photography.[1] These can manifest as exactly the same colour of the moving object which is producing it or can sometimes be a randomly selected colour of their own.

A relatively consistent way to reproduce this visual effect is to simply move one's hand in front of their face or throw an object under the influence of a moderate dose of psychedelics.

This effect is capable of manifesting itself across the 4 different levels of intensity described below:

  1. Subtle - At the lowest level, tracers can be described as an almost completely transparent after image which disappears quickly and drags closely behind moving objects.
  2. Distinct - At this level, tracers increase in length to become roughly half as long as the distance across the visual field which the object it is following has travelled. The clarity of these tracers shifts from barely visible to distinct and partially transparent in colour.
  3. Intense - At this level, tracers become mostly solid in appearance and almost completely opaque with increasingly distinct and sharp edges. This creates a clear contrast between the tracer itself and the background behind it. The tracers become slower to fade from a person's vision and can remain in the air for up to several seconds. This results in longer trails covering the entire distance across the visual field which the object creating it has moved.
  4. All-encompassing - At the highest level, a person’s visual field has become so sensitive to the creation of tracers that it entirely smudges and blurs into an all-encompassing tracer at the slightest movement of an object or the eye. This can make it extremely difficult to see unless one's eyes are kept still in a motionless environment as tracers linger almost indefinitely or until one looks elsewhere within their visual field.

Tracers are often accompanied by other coinciding effects such as drifting and after images. They are most commonly induced under the influence of mild dosages of psychedelic[2][3] compounds, such as LSD[4][5][6][7], psilocybin, and mescaline. However, they can also occur less commonly under the influence of certain stimulants and dissociatives such as MDMA or 3-MeO-PCP.

Image examples


Psychoactive substances

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

... further results

Experience reports

Anecdotal reports which describe this effect within our experience index include:

See also

Palinopsia (Wikipedia)

References

  1. ↑ Dubois, Julien; VanRullen, Rufin (2011). "Visual Trails: Do the Doors of Perception Open Periodically?". PLoS Biology. 9 (5): e1001056. doi:10.1371/journal.pbio.1001056. ISSN 1545-7885. 
  2. ↑ Abraham, H. D., Mccann, U. D., Ricaurte, G. A. (2002), "Psychedelic Drugs", CiteSeerX 
  3. ↑ O'Malley, John E. (1972). "Trifluoperazine for The "Trailing" Phenomenon". JAMA: The Journal of the American Medical Association. 220 (9): 1244. doi:10.1001/jama.1972.03200090066017. ISSN 0098-7484. 
  4. ↑ Abraham, Henry David (1983). "Visual Phenomenology of the LSD Flashback". Archives of General Psychiatry. 40 (8): 884. doi:10.1001/archpsyc.1983.01790070074009. ISSN 0003-990X. 
  5. ↑ Abraham, Henry D.; Wolf, Ernst (1988). "Visual function in past users of LSD: Psychophysical findings". Journal of Abnormal Psychology. 97 (4): 443–447. doi:10.1037/0021-843X.97.4.443. ISSN 1939-1846. 
  6. ↑ Asher, Harvey (1971). ""Trailing" Phenomenon—A Long-Lasting LSD Side Effect". American Journal of Psychiatry. 127 (9): 1233–1234. doi:10.1176/ajp.127.9.1233. ISSN 0002-953X. 
  7. ↑ Schwartz, K. (1997). "Nefazodone and visual side effects". American Journal of Psychiatry. 154 (7): 1038a–11038. doi:10.1176/ajp.154.7.1038a. 
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