pupillometer


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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
References in periodicals archive ?
Participants were trained to use the automated pupillometer by an intensive care nurse proficient in using the device.
The automated pupillometer would be deemed feasible if at least 80% of readings were completed as intended.
Video acquisition and recording functions in the pupillometer system were achieved in a cost-effective manner using a common web camera (INCA_IC-3562 model) attached to a standard laptop PC via a USB cable and a software package (AMCAP Version 8.11).
The pupillometer operation method was as follows: The user would press the LEFT scan button when detecting the left eye, and press the RIGHT scan button for the right eye.
The pupillometer is a tool that can be used to measure both the NPD and the ID, in which the measurement is based on the assessment of the corneal reflex in both eyes while the patient observes a fixation point.
Nuijts, "Comparison of two pupillometers in determining pupil size for refractive surgery," Acta Ophthalmologica Scandinavica, vol.
It uses an eyedrop containing an active pharmaceutical and a pupillometer which provides accurate pupil measurement.
The PUPILSCAN II Model 12A is an automated, micro-processor-based pupillometer that uses infrared imaging technology to digitize the pupil image, and sophisticated software to extract the diameter of the pupil from the captured image.
Eye movement and pupillary response data were collected at a rate of 60 Hz using an Applied Science Laboratories Eye View Monitor and TV Pupillometer (system model 1994-S).
Details of experimental session: An infra-red binocular television pupillometer (Applied Science Laboratories, Waltham, MA) was used for the recording of subjects' resting pupil diameter in light, in the dark, and of light and darkness reflexes.
Integration of pupillometer technology has increased in recent years, particularly in neurocritical care settings.
The preoperative examination included uncorrected distance visual acuity (UDVA); corrected distance visual acuity (CDVA); manifest refraction using the fogging method and cycloplegic refraction after 30 minutes of the instillation of two drops of cyclopentolate separated by 20 minutes; slit-lamp biomicroscopy; ultrasonic pachymetry (Ocuscan RxP; Alcon Laboratories Inc., Fort Worth, TX); Goldmann tonometry; scotopic, low mesopic, and high mesopic pupillometry (Procyon Pupillometer P2000SA; Procyon Instruments Ltd., Stirling, United Kingdom); corneal topography (Eyetop; CSO, Firenze, Italy); and fundus evaluation.