An interpretation of what is believed to have been a form of <a href="https://en.wikipedia.org/wiki/Scintillating_scotoma" class="extiw" title="en:Scintillating scotoma">scintillating scotoma</a>, experienced by the author in June 2011. It is to be looked on at the center of the image. 
<p>The <a href="https://en.wikipedia.org/wiki/Aura_(symptom)" class="extiw" title="en:Aura (symptom)">aura</a> was shaped like a spiral starting in the center of the vision field, passing over upper left quadrant and reaching limit of vision field at lower left border. The scintillations of the aura had some resemblance to a <a href="https://en.wikipedia.org/wiki/Widmanst%C3%A4tten_pattern" class="extiw" title="en:Widmanstätten pattern">Widmanstätten pattern</a>, and made it relatively easy to make out the borders of the aura, which were relatively well demarcated from normal areas. It was impossible to distinguish any shapes within the aura, but, similarly to the <a href="https://en.wikipedia.org/wiki/Blind_spot_(vision)" class="extiw" title="en:Blind spot (vision)">physiological blind spot</a>, it melted into the background with the overall coloring appearing to represent that of the target objects in the environment. No obvious <a href="https://en.wikipedia.org/wiki/Zigzag" class="extiw" title="en:Zigzag">zigzag</a> pattern was seen.
</p><p>Onset was over a few minutes and it faded away (rather than decreased in area) over approximately 30 minutes. It was succeeded by no or negligible headache.
</p>
Scotomas had been experienced before at frequencies of approximately one to two times per year, and of similar duration, but not with as clearly demarcated scintillating areas as on this occasion. A previous brain <a href="https://en.wikipedia.org/wiki/X-ray_computed_tomography" class="extiw" title="en:X-ray computed tomography">CT-scan</a> was normal.
<p><a href="https://en.wikipedia.org/wiki/User:Mikael_H%C3%A4ggstr%C3%B6m" class="extiw" title="en:User:Mikael Häggström">Mikael Häggström</a>.
</p><p>When using this image in external works, it may be cited as:
</p>
<ul><li><cite style="font-style:normal">Häggström, Mikael (2014). "<a class="external text" href="https://en.wikiversity.org/wiki/WikiJournal_of_Medicine/Medical_gallery_of_Mikael_H%C3%A4ggstr%C3%B6m_2014">Medical gallery of Mikael Häggström 2014</a>". <i>WikiJournal of Medicine</i> <b>1</b> (2). <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.15347/wjm/2014.008">10.15347/wjm/2014.008</a>. <a href="https://en.wikipedia.org/wiki/International_Standard_Serial_Number" class="extiw" title="en:International Standard Serial Number">ISSN</a> <a rel="nofollow" class="external text" href="https://www.worldcat.org/issn/2002-4436">2002-4436</a>.</cite> <a rel="nofollow" class="external text" href="https://creativecommons.org/publicdomain/zero/1.0/deed.en">Public Domain</a>.</li></ul><p>or
</p>
<ul><li><i>By Mikael Häggström, used with permission.</i></li></ul>
2011-06-21
<p><span class="int-own-work" lang="en">Own work</span>
</p>
<div class="thumb tleft"><div class="thumbinner" style="width:222px;"><a href="//commons.wikimedia.org/wiki/File:Millet_fields_in_Annapurna.png" class="image"><img src="https://upload.wikimedia.org/wikipedia/commons/thumb/2/23/Millet_fields_in_Annapurna.png/220px-Millet_fields_in_Annapurna.png" decoding="async" width="220" height="165" class="thumbimage" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/2/23/Millet_fields_in_Annapurna.png/330px-Millet_fields_in_Annapurna.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/2/23/Millet_fields_in_Annapurna.png/440px-Millet_fields_in_Annapurna.png 2x" data-file-width="1024" data-file-height="768"></a>  <div class="thumbcaption"><div class="magnify"><a href="//commons.wikimedia.org/wiki/File:Millet_fields_in_Annapurna.png" class="internal" title="Enlarge"></a></div>Original photo without aura.</div></div></div>