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Flashes of light or phosphenes are the sensation of light without light actually entering the eye. This phenomenon can be evoked by stimulation of the retina or the visual cortex of the brain and can appear unilaterally or bilaterally. From an ophthalmologic perspective, phosphenes can arise from photoreceptor induction by mechanical,1,2 inflammatory,3 or vascular4 stimuli. Therefore, it is necessary to determine the origin of phosphenes for further management. We encountered a patient who reported having phosphenes while moving his eyes laterally. We performed various ophthalmologic imaging studies to identify the origin of these phosphenes.
Footnotes
Author contributions: Yong Un Shin: study concept and design, drafting and revising the manuscript for content. Han Woong Lim: study concept design, acquisition of data, medical writing for content. Ji Hong Kim: analysis and interpretation of data, drafting and revising the manuscript for content.
Study funding: No targeted funding reported.
Disclosure: The authors report no disclosures relevant to the manuscript. Go to Neurology.org for full disclosures.
- Received March 23, 2016.
- Accepted in final form September 6, 2016.
- © 2016 American Academy of Neurology
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