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I had an experience recently that helped shed some light (intended pun) on the origin (at least partly) of the visual disturbances experienced while under the influence of LSD; on 02/05 I went to an optometry appointment to have my pupils dilated (for the first time) . When I was dosed, I was instructed to keep my eyes closed for a minute--ostensibly to allow the drops to take effect--during which time, while &#x27;looking&#x27; up at the overhead flourescents, I noticed the partly eye-lid shielded light amplify in brightness linearly as I approached second 60. While not overtly pleasant, this experience was interesting, despite being something I&#x27;d sort of expected. The real fun began when I opened my eyes and replaced my contacts.
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On doing so, I first noticed what--at least--SEEMED like an enhanced visual acuity. This was transient, unfortunately/fortunately as this super-sight soon subsided sending soft &lt;!-- (Sorry: carried away)--&gt; halos from the periphery of my sight line centrally, so that only a tiny (in proportion) circumference was left out of which to see unobstructed. Here--I think--I&#x27;m describing tunnel vision: one much like that experienced--at least in my subjection--during an acid trip. The similarities stopped not there, in that--upon leaving the office to walk 1/8 mile down the very well-lit link of this very large metropolitan hospital back to my lab (in said institution[different building]) --I began to notice very evocative light tricks (this link is windowed and I spend all of my day deprived of natural light) with light registering (softly) peripherally and then exploding into sight as it approached the ever-tinier unobstructed circumference. While being fairly intense, this experience was thoroughly enjoyable, allowing me to experience some of the tricks of LSD with a lucid mentality.
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I want to state-unequivocally--that these &#x27;disturbances&#x27;--approached nowhere near the intricacy of acid-visuals and were more like the backdrop for visual meandering during same; it always seemed like I wouldn&#x27;t hallucinate anything until my mind/drug was given novel enough visual inspiration from phenomena like these light tricks when I used to partake in such things, 10 years ago (several times over a year).
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The above-mentioned similarities have led me to a unique (probably previously articulated) hypothesis: the &#x27;visuals&#x27; I&#x27;d always credited to some neuro-involvement during a trip are at least partly--perhaps 50%--informed by pupil-dilation in same. Interesting.&lt;!-- End Body --&gt;
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&lt;tr&gt;&lt;td width=&quot;700&quot;&gt;Exp Year: 2010&lt;/td&gt;&lt;td width=&quot;90&quot;&gt;ExpID: 83694&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td&gt;Gender: Male&lt;/td&gt;&lt;td&gt; &lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td&gt;Age at time of experience: 28&lt;/td&gt;&lt;td&gt; &lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td&gt;Published: May 28, 2020&lt;/td&gt;&lt;td&gt;Views: 853&lt;/td&gt;&lt;/tr&gt;
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&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;LSD (2), Endogenous (86) : Retrospective / Summary (11), General (1), Not Applicable (38)&lt;/td&gt;&lt;/tr&gt;
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