coloboma: meaning, definition, pronunciation and examples
Very RareTechnical / Medical
Quick answer
What does “coloboma” mean?
A congenital gap, hole, or fissure in a structure of the eye, such as the iris, retina, choroid, or eyelid.
Audio
Pronunciation
Definition
Meaning and Definition
A congenital gap, hole, or fissure in a structure of the eye, such as the iris, retina, choroid, or eyelid.
An embryological defect in the fusion of the optic fissure, resulting in a missing piece of ocular tissue, often leading to visual field defects or changes in the appearance of the eye.
Dialectal Variation
British vs American Usage
Differences
No differences in meaning or usage; identical in both medical communities.
Connotations
Purely clinical, without cultural connotations.
Frequency
Equally rare and specialised in both varieties.
Grammar
How to Use “coloboma” in a Sentence
The patient presented with a [location] coloboma.A coloboma of the [eye structure] was diagnosed.Vocabulary
Collocations
Examples
Examples of “coloboma” in a Sentence
adjective
British English
- colobomatous iris
American English
- colobomatous defect
Usage
Meaning in Context
Business
Not used.
Academic
Used in medical, biological, and genetics papers describing congenital anomalies.
Everyday
Virtually never used outside of a medical diagnosis context.
Technical
Core term in ophthalmology, optometry, and paediatric medicine.
Vocabulary
Synonyms of “coloboma”
Neutral
Weak
Vocabulary
Antonyms of “coloboma”
Watch out
Common Mistakes When Using “coloboma”
- Mispronunciation (e.g., 'colombia').
- Confusing it with 'glaucoma' or 'melanoma'.
- Using it as a general term for any eye defect.
FAQ
Frequently Asked Questions
No, it is a structural defect. It can cause vision problems, including blind spots (scotomas), but severity varies widely.
Generally, no. The missing tissue cannot be regenerated. Surgery is rarely performed and only in specific cases, such as for an eyelid coloboma or to prevent retinal detachment.
It can be, often as part of a genetic syndrome. Many cases are sporadic, but genetic counselling is recommended.
Not necessarily. It can be an isolated finding. However, it is associated with several syndromes, so a paediatric assessment is important to rule out other issues.
A congenital gap, hole, or fissure in a structure of the eye, such as the iris, retina, choroid, or eyelid.
Coloboma is usually technical / medical in register.
Coloboma: in British English it is pronounced /ˌkɒləˈbəʊmə/, and in American English it is pronounced /ˌkɑːləˈboʊmə/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: 'COLOured BOwl Missing A piece' – a piece missing from the coloured part (iris) or the bowl-like structure of the eye.
Conceptual Metaphor
An eye with a coloboma is like a camera with a permanent, unfixable notch in its lens or sensor.
Practice
Quiz
What is a coloboma?