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Titolo:
NEW VIDEO PUPILLOMETER
Autore:
MCLAREN JW; FJERSTAD WH; NESS AB; GRAHAM MD; BRUBAKER RF;
Indirizzi:
MAYO CLIN & MAYO FDN,DEPT OPHTHALMOL,200 1ST ST SW ROCHESTER MN 55905 MAYO CLIN & MAYO FDN,DIV ENGN & TECH SERV ROCHESTER MN 55905
Titolo Testata:
Optical engineering
fascicolo: 3, volume: 34, anno: 1995,
pagine: 676 - 683
SICI:
0091-3286(1995)34:3<676:NVP>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
PUPIL CYCLE TIME; CONSTRICTION; PERIMETRY; DARKNESS;
Keywords:
OPHTHALMOLOGY; PUPILS; PUPILLOMETERS; PUPILLARY LIGHT REFLEX; VIDEO CAMERAS; INSTRUMENTATION; INFRARED;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
51
Recensione:
Indirizzi per estratti:
Citazione:
J.W. Mclaren et al., "NEW VIDEO PUPILLOMETER", Optical engineering, 34(3), 1995, pp. 676-683

Abstract

An instrument is developed to measure pupil diameter from both eyes in the dark. Each eye is monitored with a small IR video camera acid pupil diameters are calculated from the video signal at a rate of 60 Hz. A processing circuit, designed around a video digitizer, a digital logic circuit, and a microcomputer, extracts pupil diameter from each video frame in real time. This circuit also highlights the detected outline of the pupil on a monitored video image of each eye. Diameters areexported to a host computer that displays, graphs, analyzes, and stores them as pupillograms. The host computer controls pupil measurementsand can turn on a yellow light emitting diode mounted just above eachvideo camera to excite the pupillary light reflex, We present examples of pupillograms to illustrate how this instrument is used to measurethe pupillary light reflex and pupil motility in the dark.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 06:44:12