Verarbeitung von Bildsequenzen bei der ortsauflösenden Pupillographie

Schultes, N.; Doepfer, D.; Baldauf, Heike; Mertz, M.

doi:10.1007/978-3-642-67445-7_37

Cited by 1 publication

(3 citation statements)

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“…Development of new pupillographic methods has resulted in an ever increasing complexity of expensive apparatus [34][35][36][37][38][39][40][41][42]. Here, it is shown how an electronic analysis of the pupillomotor light reflex may be achieved using mostly commercially available, standardized equipment.…”

Section: Rationalementioning

confidence: 99%

“…Such noise may be a source of disturbance in open loop systems unless the scan is rigorously controlled during its ....... 0 3 ........................................................................... In the majority of available systems, i.e. systems working with area summation (with the exception of 34,35,36,38,39), only integral quantities (such as the area of the pupil as a function of time) may be measured. This procedure results in high temporal resolution.…”

Section: Features Of the Puptrak 10 Systemmentioning

confidence: 99%

“…In addition, it permits the following derived quantities related to pupillary measurement to be extracted: (a) horizontal diameter; (b) vertical diameter; (c) any oblique diameter; (d) circumference; (e) shape factors, such as the ratio of vertical to horizontal diameter; (f) the deformation ratio (ratio of the horizontal radius to the radius derived from area); (g) The circumference/area ratio; and (h), graphic three-dimensional displays of the space coordinates x, y, and time. If the temporal course is of no interest, the motility as a function of the radius (around 360 ~ may be displayed [38].…”

Section: Features Of the Puptrak 10 Systemmentioning

confidence: 99%

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Puptrak 1.0 — a new semiautomated system for pupillometry with the Octopus perimeter: A preliminary report

Fankhauser¹

1989

Doc Ophthalmol

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A provisional, semiautomated version of a system for automated testing of the afferent pupillary reflex with perimetric methods under controlled conditions is described. The target projected onto the perimeter cupola is used as the stimulus for triggering the pupillary response. In a modification to the Octopus 201, the pupil is illuminated by two IR LED diodes, while the pupillary responses are recorded by the onboard IR sensitive TV camera built into the perimetric unit. Measurements of the pupillary area as a function of time and stimulus luminance have been performed and have resulted in consistent results. Here, one perimetric program, working with stimuli above the threshold for the afferent pupillary light reflex is described. The present setup works with system-specific software and standard hardware, the central data processing unit being a desk-top computer (IBM PC AT-03). The mating of an automated pupillary measuring unit to an automated perimeter may open the door for a more widespread evaluation of the value and the clinical application range of pupillary perimetry and may be of interest in other areas of visual and clinical psychophysics. The shortcomings of the present system, in particular insufficient temporal resolution and lack of full automation, are being removed at the present time.

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