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Time changes of contrast thresholds during automatic perimetry

Heijl, A LU (1977) In Acta Ophthalmologica 55(4). p.696-708
Abstract

Contrast thresholds were continuously recorded in six points of the visual field through a repetitive up-and-down staircase method using the automatic perimeter developed by Heijl & Krakau (1975b). The uninterrupted sessions lasted about 30 min. Nineteen patients with a verified diagnosis of glaucoma, or in whom glaucoma was suspected, and twelve healthy normal subjects were tested. With increasing test time, a decreased contrast sensitivity was found. In most subjects the mean threshold increment was small (less than 1.5 dB). The threshold increments were larger in the patient group than in the normal subjects--many test points showing increments of 6-10 dB during the test session. Such a large deterioration of sensitivity was most... (More)

Contrast thresholds were continuously recorded in six points of the visual field through a repetitive up-and-down staircase method using the automatic perimeter developed by Heijl & Krakau (1975b). The uninterrupted sessions lasted about 30 min. Nineteen patients with a verified diagnosis of glaucoma, or in whom glaucoma was suspected, and twelve healthy normal subjects were tested. With increasing test time, a decreased contrast sensitivity was found. In most subjects the mean threshold increment was small (less than 1.5 dB). The threshold increments were larger in the patient group than in the normal subjects--many test points showing increments of 6-10 dB during the test session. Such a large deterioration of sensitivity was most common in eyes with visual field defects. Test points which showed large threshold increments were often situated in the vicinity of documented visual field defects. In eyes with pathological visual fields, the short-term variation increased with increasing test time. An impairment of fixation with increasing test time was found in the patient group.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Adult, Computers, Glaucoma/diagnosis, Humans, Middle Aged, Photic Stimulation, Time Factors, Visual Field Tests/instrumentation, Visual Fields, Visual Perception
in
Acta Ophthalmologica
volume
55
issue
4
pages
13 pages
publisher
Wiley-Blackwell
external identifiers
  • scopus:0017519514
  • pmid:578374
ISSN
0001-639X
DOI
10.1111/j.1755-3768.1977.tb05668.x
language
English
LU publication?
yes
id
9d4d0633-735b-47e8-850d-7f51038e1ffb
date added to LUP
2019-06-30 19:28:55
date last changed
2025-04-04 14:32:45
@article{9d4d0633-735b-47e8-850d-7f51038e1ffb,
  abstract     = {{<p>Contrast thresholds were continuously recorded in six points of the visual field through a repetitive up-and-down staircase method using the automatic perimeter developed by Heijl &amp; Krakau (1975b). The uninterrupted sessions lasted about 30 min. Nineteen patients with a verified diagnosis of glaucoma, or in whom glaucoma was suspected, and twelve healthy normal subjects were tested. With increasing test time, a decreased contrast sensitivity was found. In most subjects the mean threshold increment was small (less than 1.5 dB). The threshold increments were larger in the patient group than in the normal subjects--many test points showing increments of 6-10 dB during the test session. Such a large deterioration of sensitivity was most common in eyes with visual field defects. Test points which showed large threshold increments were often situated in the vicinity of documented visual field defects. In eyes with pathological visual fields, the short-term variation increased with increasing test time. An impairment of fixation with increasing test time was found in the patient group.</p>}},
  author       = {{Heijl, A}},
  issn         = {{0001-639X}},
  keywords     = {{Adult; Computers; Glaucoma/diagnosis; Humans; Middle Aged; Photic Stimulation; Time Factors; Visual Field Tests/instrumentation; Visual Fields; Visual Perception}},
  language     = {{eng}},
  number       = {{4}},
  pages        = {{696--708}},
  publisher    = {{Wiley-Blackwell}},
  series       = {{Acta Ophthalmologica}},
  title        = {{Time changes of contrast thresholds during automatic perimetry}},
  url          = {{http://dx.doi.org/10.1111/j.1755-3768.1977.tb05668.x}},
  doi          = {{10.1111/j.1755-3768.1977.tb05668.x}},
  volume       = {{55}},
  year         = {{1977}},
}