Photopsias are a visual phenomenon experienced by individuals with a variety of ocular or optic pathway pathology. In lay terms they represent flashing lights, and can be divided into unstructured or structured photopsias, the latter referring to geometric shapes 2.
Causes of photopsia include 1:
- pseudotumor cerebri
- severe cough
- vertebrobasilar insufficiency
- Charles Bonnet syndrome
- 1. Brown GC, Brown MM, Fischer DH. Photopsias: A Key to Diagnosis. Ophthalmology. 2015;122 (10): 2084-94. doi:10.1016/j.ophtha.2015.06.025 - Pubmed citation
- 2. Blom JD. A Dictionary of Hallucinations. Springer Science & Business Media. (2009) ISBN:1441912231. Read it at Google Books - Find it at Amazon