constant pupil

USAGE SUMMARY

The phrase "constant pupil" is correct and usable in written English.
It can be used to describe someone who is always learning or seeking knowledge, often in an educational or personal development context. Example: "As a lifelong learner, she considers herself a constant pupil, always eager to absorb new information and skills."

✓ Grammatically correct

Science

Human-verified examples from authoritative sources

Exact Expressions

7 human-written examples

To obtain a constant pupil diameter, before VEP recording, each subject adapted to the ambient room light for 10 min.

The Journal of Headache and Pain

This was realized by measuring the pupil size of an artificial eye with a constant pupil size, the "gaze" of which was directed to different screen positions.

Behavior Research Methods

Constant pupil size was confirmed by the absence of obstructions and vignetting that would have occurred had the imaging beam been larger.

Biomedical Optics Express

We quantified the systematic measurement error by measuring the pupil size of an artificial eye (which had a constant pupil size) and, in a more pragmatic approach,by measuring pupil size during an effortless z-string-scanning task.

Behavior Research Methods

The "pure" measurement error was revealed by the artificial eye model, which has a constant pupil size, but for which the eye tracker nevertheless reported varying pupil size data dependent on the horizontal gaze position.

Behavior Research Methods

Whereas one might be tempted by a cognitive interpretation of this measured pupil response during sentence reading and z-string scanning, the data from the artificial eye model indicate a systematic measurement error: Although the artificial eye has a constant pupil size, the pupil size as measured by the eye-tracking system changed with its orientation (i.e., gaze position).

Behavior Research Methods

Human-verified similar examples from authoritative sources

Similar Expressions

53 human-written examples

We found no unique advantage of large eyes for detecting large luminous objects when calculating maximum viewing distances in the deep mesopelagic sea with revised constants (pupil size = 4 cm; intensity of bioluminescence = 10 quanta/s; zooplankton density/nearest neighbor distance = 0.55 m).

BMC Evolutionary Biology

To realize a condition with constant physical pupil size, an artificial eye model with a pupil diameter of 4.5 mm was constructed (see Fig.  2b).

Behavior Research Methods

Furthermore, it can be noted that the blood vessel reflection has not a directional characteristic appearing approximately constant during the pupil scan.

Biomedical Optics Express

Most difficult is the constant churn of pupils.

The Economist

BALU SUDHA, a teacher at a private girls' school in Mumbai, enrolled on a sex education course because she felt unable to answer her pupils' constant questions about sex.

The Economist

Expert writing Tips

Best practice

When describing experimental conditions in scientific writing, use "constant pupil" to clearly indicate that the pupil size was intentionally kept unchanged throughout the experiment.

Common error

Avoid using "constant pupil" metaphorically in general writing. The term is highly specific and can sound awkward or confusing outside of a scientific or technical discussion of eye physiology or experimental setup. For broader concepts of consistency, consider using phrases like "steady focus" or "unwavering attention" instead.

Linguistic Context

The primary grammatical function of "constant pupil" is that of a modifier and a noun. The adjective "constant" modifies the noun "pupil", describing a state of unchanging size. Ludwig provides examples showing it often appears in the context of scientific experiments.

Expression frequency: Uncommon

Frequent in

Science

100%

Less common in

News & Media

0%

Formal & Business

0%

Encyclopedias

0%

Ludwig's WRAP-UP

In summary, the phrase "constant pupil" is a technical term primarily used within scientific contexts to describe a pupil that maintains an unchanging size, often artificially or under controlled experimental conditions. As Ludwig AI confirms, its usage is grammatically correct within these specific fields. While the phrase isn't applicable in general or informal contexts, alternatives like "fixed pupil size" can convey similar ideas. When writing, be mindful of the specific, technical nature of the term to ensure clarity and avoid misinterpretation.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

fixed pupil size

This alternative emphasizes the unchanging size of the pupil, similar to "constant pupil".

unchanging pupil diameter

This phrase focuses on the consistent diameter of the pupil, synonymous with a constant size.

stable pupil size

Using "stable" suggests a lack of fluctuation, conveying the same meaning as "constant".

consistent pupil

This alternative uses "consistent" as a synonym for "constant", maintaining the meaning.

invariant pupil size

"Invariant" emphasizes the lack of change in the pupil's size.

non-varying pupil

This option highlights the absence of variation in pupil size.

steady pupil diameter

"Steady" implies a stable and unchanging condition for the pupil's diameter.

controlled pupil size

This suggests that the pupil size is being actively maintained at a constant level.

regulated pupil diameter

Similar to controlled, this indicates an active regulation to keep the pupil diameter constant.

artificial pupil with fixed diameter

This phrase specifies that the constant pupil is artificial and has a set diameter.

FAQs

What does "constant pupil" mean in scientific research?

In scientific research, "constant pupil" refers to a pupil whose size or diameter is maintained at a fixed level throughout an experiment or observation, often achieved artificially or through controlled conditions.

In what contexts is the term "constant pupil" typically used?

The term "constant pupil" is typically used in scientific papers, research reports, and technical documentation related to vision, ophthalmology, or eye-tracking studies.

Are there alternative phrases for "constant pupil" that maintain the same meaning?

Yes, alternatives such as "fixed pupil size", "stable pupil size", or "unchanging pupil diameter" can be used to convey a similar meaning.

Is it appropriate to use "constant pupil" in everyday conversation?

No, "constant pupil" is a technical term and is not typically used in everyday conversation. More general terms should be used instead to define a medical condition or similar.