- Lesions in an optic tract, causing a loss of vision in the opposite visual field in both eyes (for example, a lesion in the right optic tract would result in loss of vision of the left visual field).
- Causes include schizencephaly, stroke, tumors, and other trauma to brain
- The following image represents vision of someone with left homonymous heminopsia


University of Colorado at Boulder

- Loss of vision or blindness in half of one's visual field
- Most commonly is permanent; can occur temporarily due to migraines
- Two major types of permanent hemianopia: heteronymous and homonymous hemianopia
- The image below represents vision of an individual without any damage to their visual fields. Use this as a reference for heteronymous and homonymous hemianopia

Hemianopsia/Hemianopia

Neves, A., Carvalheira, F., Campos, J., Alfaiate, P., Campos, A., & Castro Sousa, J. P. (2016). Right homonymous hemianopia: A clinical case report of schizencephaly. Case Reports in Ophthalmology, 7(1), 16–20. https://doi.org/10.1159/000443323 

Right homonymous hemianopia: A clinical case report of schizencephaly

Paris as seen with left homonymous hemianopsia. (2004). Wikimedia Commons. Retrieved January 10, 2022, from https://upload.wikimedia.org/wikipedia/commons/3/3b/Paris_as_seen_with_left_homonymous_hemianopsia.png. 

Paris as seen with left homonymous hemianopsia 

Homonymous Hemianopsia

- Bitemporal hemianopsia
- Binasal hemianopsia

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