gas-permeable lens: meaning, definition, pronunciation and examples
LowTechnical / Medical
Quick answer
What does “gas-permeable lens” mean?
A type of rigid contact lens designed to allow oxygen to pass through the lens material to the cornea.
Audio
Pronunciation
Definition
Meaning and Definition
A type of rigid contact lens designed to allow oxygen to pass through the lens material to the cornea.
A contact lens made from materials that transmit oxygen and other gases, while maintaining a stable shape on the eye. They are an alternative to traditional 'hard' lenses (which were impermeable) and modern soft hydrogel lenses.
Dialectal Variation
British vs American Usage
Differences
No significant lexical difference. Both use the full term and the abbreviations 'GP lens' or 'RGP lens'.
Connotations
None. Purely technical description.
Frequency
Equally low frequency in both dialects, confined to professional and patient education contexts in eye care.
Grammar
How to Use “gas-permeable lens” in a Sentence
The optometrist prescribed [gas-permeable lenses] for my astigmatism.I prefer [gas-permeable lenses] to soft ones for clarity.Vocabulary
Collocations
Examples
Examples of “gas-permeable lens” in a Sentence
adjective
British English
- The gas-permeable lens material is more durable.
- She needed a gas-permeable lens fitting.
American English
- The gas-permeable lens material is more durable.
- He ordered gas-permeable lens solutions.
Usage
Meaning in Context
Business
Used in marketing materials for optical practices and by manufacturers of contact lens materials.
Academic
Common in optometry textbooks, research papers on corneal physiology and contact lens design.
Everyday
Rare. Used primarily in conversations between a patient and their eye care professional.
Technical
The standard term in optometric prescriptions, fitting guides, and product specifications.
Vocabulary
Synonyms of “gas-permeable lens”
Strong
Neutral
Weak
Vocabulary
Antonyms of “gas-permeable lens”
Watch out
Common Mistakes When Using “gas-permeable lens”
- Pronouncing 'permeable' as /pərˈmaɪ.ə.bəl/ instead of /ˈpɜː.mi.ə.bəl/.
- Omitting the hyphen and writing 'gas permeable lens', which is less standard in technical writing.
- Confusing with 'silicone hydrogel' lenses, which are soft and also gas-permeable.
FAQ
Frequently Asked Questions
They are a modern type of rigid lens. Traditional 'hard' lenses were made of PMMA, which was impermeable to oxygen. All modern rigid lenses are gas-permeable, but the term 'hard lens' is still sometimes used informally.
They are often prescribed for people with high or irregular astigmatism, keratoconus, or those who need very precise vision correction that soft lenses cannot provide.
There is an adaptation period, often lasting a week or two, during which the lens may feel noticeable. After adaptation, most wearers find them comfortable for full-day wear.
They require specific non-abrasive cleaning and disinfecting solutions, different from those used for soft lenses. They must be stored in a clean case with fresh solution every night.
A type of rigid contact lens designed to allow oxygen to pass through the lens material to the cornea.
Gas-permeable lens is usually technical / medical in register.
Gas-permeable lens: in British English it is pronounced /ˌɡæs ˈpɜː.mi.ə.bəl ˈlenz/, and in American English it is pronounced /ˌɡæs ˈpɝː.mi.ə.bəl ˈlɛnz/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: 'Gases Pass' through the lens to keep the eye healthy. GP = Gases Pass.
Conceptual Metaphor
A BREATHING WINDOW for the eye.
Practice
Quiz
What is the primary functional benefit of a gas-permeable lens?