haplopia
Very RareTechnical, Medical
Definition
Meaning
A condition of normal, single vision.
In ophthalmology, it refers to single binocular vision without double vision (diplopia) or suppression. It is the typical, healthy state of depth perception from coordinated use of both eyes.
Linguistics
Semantic Notes
A term almost exclusively used in clinical ophthalmology. It is defined by its contrast with 'diplopia' (double vision) and 'suppression'.
Dialectal Variation
British vs American Usage
Differences
No significant differences. The spelling and meaning are identical and restricted to the same technical field.
Connotations
Neutral, purely descriptive medical term.
Frequency
Extremely rare in both varieties, used only by ophthalmologists and optometrists.
Vocabulary
Collocations
Grammar
Valency Patterns
The patient presents with/maintains haplopia.The goal of surgery is to restore haplopia.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Not used.
Academic
Used only in academic papers and textbooks in ophthalmology.
Everyday
Virtually never used in everyday conversation.
Technical
The primary context. Used to diagnose and describe the healthy function of binocular vision.
Examples
By Part of Speech
adjective
British English
- haplopic vision
American English
- haplopic vision
Examples
By CEFR Level
- The test showed he had perfect haplopia.
- Diplopia is the opposite of haplopia.
- After the corrective prism was applied, the patient reported a return to stable haplopia.
- The surgeon's primary objective was to re-establish haplopia within the patient's central visual field.
Learning
Memory Aids
Mnemonic
Think of 'haplo-' (simple, single) + '-opia' (vision condition). 'Single-vision'.
Conceptual Metaphor
VISION IS A MERGED STREAM (two visual inputs merge into one coherent picture).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'hyperopia' (дальнозоркость). 'Haplopia' describes binocular function, not a refractive error.
- The term is often translated as 'ортоптика' or 'нормальное бинокулярное зрение' in specialised contexts.
Common Mistakes
- Misspelling as 'haplopia' (incorrect).
- Using it as a general term for good eyesight instead of specifically for coordinated binocular vision.
- Confusing it with 'euphoria' due to similar word endings.
Practice
Quiz
Haplopia is best defined as:
FAQ
Frequently Asked Questions
No, it is a highly specialised medical term used almost exclusively by eye care professionals like ophthalmologists and orthoptists.
The main antonym is 'diplopia', which means double vision.
Yes. Haplopia refers specifically to the coordination of the two eyes to produce a single image. A person can have haplopia (single vision) but still be nearsighted, farsighted, or have other visual impairments.
No. 20/20 vision refers to visual acuity (sharpness of vision at a distance). Haplopia refers to binocular function. You can have 20/20 vision in each eye but still lack haplopia (e.g., have double vision).