ArticleNeuro-ophthalmology (Aeolus Press)2026
The Clinical Use of Retinotopy in Functional Hemianopia.
Article in Neuro-ophthalmology (Aeolus Press), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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10 authors.
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Abstract
Objective: Functional visual loss presents a challenge in clinical practice. Its classical diagnostic approach includes the use of bedside techniques, visual-evoked potentials (VEP), among other techniques that can be cumbersome and not always diagnostic. We investigated the use of population receptive field (pRF) mapping, a functional magnetic resonance imaging (fMRI) technique mostly used in research to study visual function in cortical visual areas, to support the diagnosis of functional hemianopia in the clinical setting. Methods: A 27-year-old female patient presenting with a 6-month history of blurred vision in both eyes, underwent clinical exam, computerized perimetry, optical coherence tomography (OCT), brain MRI, EEG, and VEP. Subsequently, she underwent fMRI stimulation. Results: There were inconsistent responses in the left hemifields during confrontational visual field testing. Computerized perimetry showed a left homonymous and congruous hemianopia. Brain MRI, EEG, and VEP were unremarkable. fMRI stimulation showed similar pRF maps between hemispheres, indicating preservation of visual function. Follow-up OCT showed no signs of homonymous transsynaptic retrograde degeneration. The diagnosis of functional hemianopia was explained, and the patient was reassured. Discussion: Cortical mapping of pRF might be a potential and helpful tool in the clinical assessment of functional visual loss.
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