- Causes of binasal hemianopsia are very sporadic, but can be deduced that it is caused from damage of temporal fibers at optic chiasm
- Very rare; less than 10 instances in literature
- Following image shows how binasal hemianopsia affects vision:

University of Colorado at Boulder

- Bitemporal hemianopsia
- Binasal hemianopsia

Heteronymous Hemianopsia 

Tsokolas, G., Khan, H., Tyradellis, S., George, J., &amp; Lawden, M. (2020). Binasal congruous hemianopia secondary to functional visual loss. Medicine, 99(27). https://doi.org/10.1097/md.0000000000020754 

Binasal congruous hemianopia secondary to functional visual loss.

Paris as seen with binasal hemianopsia. (2004). Wikimedia Commons. Retrieved January 11, 2022, from https://upload.wikimedia.org/wikipedia/commons/0/0f/Binasalvf.png

Paris as seen with binasal hemianopsia.

- Caused due to damage of nasal fibers at the optic chiasm
- Results in vision like the following image:

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