ophthalmometer: meaning, definition, pronunciation and examples
C2Technical/Specialised Medical
Quick answer
What does “ophthalmometer” mean?
An instrument for measuring the refractive errors of the eye and the curvature of the cornea.
Audio
Pronunciation
Definition
Meaning and Definition
An instrument for measuring the refractive errors of the eye and the curvature of the cornea.
A diagnostic tool used primarily by optometrists and ophthalmologists to determine the optical power of the eye and assess corneal shape, aiding in prescriptions for corrective lenses or planning for surgery. Also historically referred to as a 'keratometer' when specifically measuring corneal curvature.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. Both refer to the same medical instrument.
Connotations
Equally technical and clinical in both dialects.
Frequency
Equally low-frequency and confined to specialist fields in both regions. The synonym 'keratometer' is perhaps more common in contemporary clinical parlance.
Grammar
How to Use “ophthalmometer” in a Sentence
The [practitioner] used an ophthalmometer to measure [patient's] corneal curvature.An ophthalmometer reading indicated [specific finding].Vocabulary
Collocations
Usage
Meaning in Context
Business
Not used.
Academic
Used in medical and optical science research papers, textbooks, and theses.
Everyday
Virtually never used.
Technical
Core term in ophthalmology and optometry clinics, practitioner notes, and equipment manuals.
Vocabulary
Synonyms of “ophthalmometer”
Neutral
Weak
Watch out
Common Mistakes When Using “ophthalmometer”
- Misspelling as 'opthalmometer' (dropping the first 'h').
- Confusing it with an 'ophthalmoscope' (instrument for viewing the interior of the eye).
FAQ
Frequently Asked Questions
In modern usage, they are essentially synonyms, both referring to an instrument that measures the curvature of the cornea. Historically, 'ophthalmometer' had a broader scope, sometimes including measurement of the eye's overall refractive power.
Primarily optometrists and ophthalmologists during routine eye examinations, especially when fitting contact lenses or preparing for refractive surgery like LASIK.
No, it is a highly specialised term used almost exclusively within the fields of optometry and ophthalmology. The average person is unlikely to encounter or need this word.
It begins with 'ophth-' which is a silent 'p' followed by the consonant cluster 'phth', making it phonetically complex. Remembering the root 'ophthalmo-' (eye) can help.
An instrument for measuring the refractive errors of the eye and the curvature of the cornea.
Ophthalmometer is usually technical/specialised medical in register.
Ophthalmometer: in British English it is pronounced /ˌɒfθælˈmɒmɪtə/, and in American English it is pronounced /ˌɑːfθælˈmɑːmɪtər/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of 'ophthalmo-' (related to the eye, like in ophthalmologist) + '-meter' (a measuring device). It's a meter for the eye.
Conceptual Metaphor
A specialised ruler for the eye's surface.
Practice
Quiz
What is the primary function of an ophthalmometer?