hemianopsia: meaning, definition, pronunciation and examples
Very LowTechnical/Medical
Quick answer
What does “hemianopsia” mean?
A medical condition involving blindness in half of the visual field of one or both eyes.
Audio
Pronunciation
Definition
Meaning and Definition
A medical condition involving blindness in half of the visual field of one or both eyes.
A specific neurological or ophthalmological deficit where vision is lost in one half of the visual field, often resulting from damage to the optic pathways in the brain, such as from stroke, tumor, or trauma.
Dialectal Variation
British vs American Usage
Differences
The spelling 'hemianopia' is more common in British medical literature, while 'hemianopsia' is standard in American medical texts. Both refer to the same condition.
Connotations
Identical in both varieties; purely clinical with no additional cultural connotations.
Frequency
Extremely rare outside neurology, ophthalmology, and optometry. The spelling variant 'hemianopia' sees slightly more overall use in global English due to UK/Commonwealth publications.
Grammar
How to Use “hemianopsia” in a Sentence
[Patient] presented with [Type] hemianopsia.[Lesion] caused a contralateral hemianopsia.The hemianopsia was [adjective, e.g., dense, incomplete].Vocabulary
Collocations
Examples
Examples of “hemianopsia” in a Sentence
verb
British English
- The stroke hemianopised his left visual field.
- The tumour is hemianopising the patient's vision progressively.
American English
- The lesion hemianopsiated the right visual field.
- The condition can hemianopsiate suddenly.
adverb
British English
- The vision was lost hemianopically.
- The defect presented hemianopically.
American English
- The field was cut hemianopsically.
- He sees the world hemianopsically post-injury.
adjective
British English
- The hemianopic defect was mapped.
- She has hemianopic field loss.
American English
- The hemianopsic patient underwent therapy.
- Hemianopsic vision requires adaptation.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Exclusively in medical, neurological, and vision science research and textbooks.
Everyday
Extremely rare. Would only be used by a patient describing their own diagnosis or a professional explaining it.
Technical
The primary context. Used in clinical notes, diagnoses, specialist literature, and inter-professional communication in healthcare.
Vocabulary
Synonyms of “hemianopsia”
Strong
Neutral
Weak
Vocabulary
Antonyms of “hemianopsia”
Watch out
Common Mistakes When Using “hemianopsia”
- Misspelling: 'hemianopia' vs. 'hemianopsia' (both correct, but regional preferences exist).
- Mispronunciation: stressing the wrong syllable (e.g., hemi-AN-opsia). Correct stress is on the third syllable: he-mi-a-NOP-sia.
- Using it as an uncountable mass noun when referring to a specific instance (e.g., 'He has hemianopsia' is fine, but 'He has a dense left homonymous hemianopsia' is more precise).
FAQ
Frequently Asked Questions
There is no medical difference; they are spelling variants. 'Hemianopsia' is standard in American English, while 'hemianopia' is more common in British English.
It depends on the cause. Some cases may improve spontaneously or with treatment of the underlying condition (e.g., tumour removal), but permanent damage to neural pathways often results in a lasting deficit. Rehabilitation focuses on adaptation and compensation.
No. Blindness in one eye (monocular blindness) affects the entire visual field of that eye. Hemianopsia affects half the visual field in one or both eyes. For example, in left homonymous hemianopsia, the left half of vision is lost in both eyes.
It is core terminology in Neurology, Ophthalmology, Neuro-ophthalmology, Optometry, and Rehabilitation Medicine (e.g., for stroke or brain injury patients).
A medical condition involving blindness in half of the visual field of one or both eyes.
Hemianopsia is usually technical/medical in register.
Hemianopsia: in British English it is pronounced /ˌhɛmɪəˈnəʊpɪə/, and in American English it is pronounced /ˌhɛmiəˈnɑːpsiə/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None. The term is strictly clinical.”
Learning
Memory Aids
Mnemonic
Think: HEMI (half) + AN (without) + OPSIA (sight) = 'half without sight'.
Conceptual Metaphor
VISION IS A FIELD (hence 'visual field loss'); THE MIND/ BRAIN IS A MAP (with specific areas corresponding to specific visual field quadrants).
Practice
Quiz
What is the most precise term for blindness in the left half of both visual fields?