pupillometer


Also found in: Dictionary, Wikipedia.

pupillometer

 [pu″pĭ-lom´ĕ-ter]
an instrument for measuring the width or diameter of the pupil.

pu·pil·lom·e·ter

(pyū'pi-lom'ĕ-tĕr),
An instrument for measuring and recording the diameter of the pupil.
[pupillo- + G. metron, measure]

pu·pil·lom·e·ter

(pyū'pi-lom'ě-tĕr)
An instrument for measuring and recording the diameter of the pupil.
[pupillo- + G. metron, measure]

pupillometer 

1. An instrument for measuring the diameter of the pupil. There exist several types but the most common is a series of graduated filled circles whose sizes are compared with the pupil (Haab's pupillometer). It is also common to measure pupil size by photography or video after appropriate calibration of the method (Fig. P25). Syn. coreometer.
2. Although incorrectly used, it refers to an instrument for measuring the interpupillary distance (PD). These instruments are based either on using the pupil centres (e.g. Reichert PD gauge) or the corneal reflections (e.g. Essilor Corneal Reflection Pupillometer; Seiko SP-100 Pupillometer), but the latter can be used on the basis of the pupil centres as well. In the instruments using corneal reflections the subject views the image of a small illuminated target surrounding the observation aperture used by the examiner or made to appear as if it came from the observer's eye. That image is formed at infinity by a lens placed in front of the subject's eyes. The examiner moves a hair line to coincide with the centre of the corneal reflections and reads the monocular and total interpupillary distances. Syn. interpupillometer (this is the most appropriate term for this instrument); PD gauge; PD meter. See PD rule.
Fig. P25 Typical pupillometerenlarge picture
Fig. P25 Typical pupillometer

pupillometer

an instrument for measuring the width or diameter of the pupil.
References in periodicals archive ?
To test whether pupillometer measurements were more accurate than manual measurements, the difference between the examiners' errors for each reading of each eye was calculated, summarized by medians and 95% confidence intervals, and tested by the nonparametric Wilcoxon signed-rank test.
Five complete sets of measurements were deleted from the analysis because the pupillometer was unable to register a reading due to factors such as scleral edema.
Its first product was a pupillometer for precise pupil measurement and this is now the global gold standard in the laser surgery industry, and is produced and sold under licence with Haag-Streit of Switzerland.
The ForSite[TM] pupillometer (NeurOptics, San Clemente, CA) is a new medical device designed to capture and analyze pupil dynamics (Fig.
Each set of measurements was obtained in the same order: visual assessment by a volunteer ICU nurse, measurement using the pupil gauge, and measurement using the ForSite pupillometer.
The NPi([TM])-100 Pupillometer uses infrared imaging technology to measure the pupil's response to light stimulus, removing subjectivity and variability in the measurement of pupil size and the pupillary light reflex.
Visual inspection with a pen light will often reveal a non-reactive pupil, whereas a subsequent reading with the pupillometer would show the light reflex to be present.
7, 2011 /PRNewswire/ -- NeurOptics, the worldwide leader in pupillometry, today announced the availability of the new VIP(TM)-200 Variable Pupillometer for the measurement of pupil size under varying light conditions to enhance opportunities for successful outcomes for refractive surgery and premium intraocular lens candidates.
The VIP(TM)-200 Variable Pupillometer is a single-button activation, battery operated hand-held device which very accurately measures pupil size with no user calibration required.
In an emerging approach, a handheld pupillometer is used to assess pupillary responses as an indirect measure of ICP.
The test requires that an exact amount of a specially prepared solution of the cholinergic antagonist, tropicamide, be placed in one eye of the patient, and the rate of pupil dilation is measured using a pupillometer.
WCCT Global has the tools to run these trials including: atomic clocks and watches for time synchronization, six (6) refrigerated centrifuges, 12+ ECG Machines, three -70ae C freezers, several -20ae C freezers, several 2-8aeC refrigerators, treadmill equipment, slit lamps, Goldmann and Perkins applanation tonometers, pupillometers, telemetry and holter-capable, stadiometers, crash carts, nitric oxide machine, a platelet aggregometry lab and multiple spirometry units.