Visual stress:
Gespeichert in:
| Beteilige Person: | |
|---|---|
| Format: | Buch |
| Sprache: | Englisch |
| Veröffentlicht: |
Oxford u.a.
Oxford Univ. Press
1995
|
| Schriftenreihe: | Oxford psychology series
24 |
| Schlagwörter: | |
| Links: | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=006718482&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| Umfang: | XXII, 194 S. Ill., graph. Darst. |
| ISBN: | 019852174X |
Internformat
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| 490 | 1 | |a Oxford psychology series |v 24 | |
| 650 | 4 | |a Fatigue visuelle | |
| 650 | 7 | |a Manifestations oculaires des maladies |2 ram | |
| 650 | 7 | |a Stress |2 gtt | |
| 650 | 7 | |a Stress |2 ram | |
| 650 | 7 | |a Vision, Troubles de la |2 ram | |
| 650 | 7 | |a Visuele waarneming |2 gtt | |
| 650 | 4 | |a Asthenopia | |
| 650 | 4 | |a Eyestrain | |
| 650 | 4 | |a Seizures |x etiology | |
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Datensatz im Suchindex
| _version_ | 1819252829292855296 |
|---|---|
| adam_text | Titel: Visual stress
Autor: Wilkins, Arnold J.
Jahr: 1995
Contents
1 Introduction 1
2 Photosensitive epilepsy 3
2.1 Introduction 3
2.1.1 The epilepsies: cause and localization 3
2.1.2 The clinical EEG examination in photosensitive epilepsy 4
2.2 The visual stimulation that causes seizures 7
2.2.1 Flicker 7
2.2.2 Pattern 9
2.2.3 Viewing conditions 21
2.2.4 Common environmental stimuli 23
2.2.5 Measuring susceptibility - theoretical implications 24
2.3 Inferences regarding the seizure mechanism 24
2.3.1 Pattern-induced epilepsy starts in the visual cortex 25
2.3.2 The epilepsy involves one cerebral hemisphere or both
hemispheres independently 27
2.3.3 The seizures are started by normal physiological excitation 28
2.3.4 The seizures start when physiological excitation involves more
than a critical cortical area 29
2.3.5 The seizures are most likely when cortical excitation is rhythmic 31
2.3.6 Sodium valproate prevents the spread of the discharge 34
2.3.7 Underlying pathophysiology 36
3 Illusions and headaches 38
3.1 Anomalous visuo-perceptual effects 38
3.2 Origin of the anomalous perceptual effects 39
3.3 Links between illusions and seizures 41
3.3.1 Patterns 41
3.3.2 Flicker 43
3.4 Illusions and discomfort 47
3.5 Illusions and headaches 47
3.5.1 Headache frequency 47
3.5.2 Time of occurrence 49
3.5.3 Types of headache 49
3.5.4 Unilateral illusions 51
3.6 Underlying pathophysiology 52
3.7 Illusions and other bodily differences 54
xx Contents
4 Strong stimulation 56
4.1 Sensory thresholds 56
4.2 Suprathreshold stimuli 58
4.3 Aggregate neuronal response 60
5 Reading 66
5.1 Text as a striped pattern 67
5.2 Measuring the stripes of text 67
5.3 Extending the measurements to two dimensions 71
5.4 Anomalous visual effects, eye-strain, and text clarity 73
5.5 Preventing eye-strain, headaches, and seizures 75
5.6 Improving text without increasing costs 79
5.7 Alternative explanations 81
6 Lighting 83
6.1 Characteristics of electric lighting 83
6.2 Pulsating discharge 84
6.3 Luminaires and depth of pulsation 84
6.4 Varieties of fluorescent lamps 86
6.5 Modulation 88
6.6 Physiological consequences of the pulsation in light 89
6.6.1 Flicker fusion 89
6.6.2 Subcortical response to fluorescent lighting 90
6.6.3 Eye movements 91
6.7 Links with headaches and eye-strain 92
6.7.1 Electrophysiological evidence 92
6.7.2 A survey of office workers 92
6.8 Links with agoraphobia 96
6.9 Physiological mechanisms for discomfort 97
6.10 Remedial measures 99
6.10.1 Tinted lenses for fluorescent lighting? 99
6.11 Spatial layout of lighting 103
7 Electronic displays 104
7.1 Television 104
7.2 Television epilepsy 105
7.3 Implications for treatment 107
7.4 Television headaches 108
7.5 Computer displays 109
7.6 Saccadic suppression 109
7.7 Corrective saccades 110
Contents xxi
7.8 Modulation depth 111
7.9 Visibility of flicker 111
7.10 Precision of eye movement in relation to task performance 112
7.11 Prevention of discomfort 114
8 Design 116
8.1 Stripes are everywhere 116
8.2 Effects of striped designs 117
8.3 Deliberate design and modular construction 124
8.4 Convenience versus necessity 125
8.5 Natural images 127
8.6 Lighting design 128
9 Colour as therapy 130
9.1 Extravagant claims 130
9.2 Perceptual distortion of text and the effects of colour 132
9.3 An Intuitive Colorimeter 134
9.4 Colorimeter: preliminary findings 137
9.5 Comparison of techniques 141
9.6 Therapeutic precision tinting: lenses and dyes 142
9.7 Therapeutic precision tinting: assessment and tinting procedure 144
9.8 Therapeutic precision tinting: initial clinical results 146
9.8.1 Case histories 146
9.8.2 Open trial 147
9.9 Placebo-controlled trial 148
9.9.1 Selection of subjects 149
9.9.2 Chromaticities of the lenses 149
9.9.3 Relief of symptoms 150
9.10 Open trials in photosensitive epilepsy 152
9.11 Overlays 154
9.12 A physiological basis for the benefits of coloured tints? 155
10 Speculation 159
10.1 Visual physiology 159
10.1.1 Excitatory connections between columns 159
10.1.2 The magnocellular and parvocellular pathways 160
10.1.3 Migraine and metabolic demand 163
10.1.4 Pain as a response to visual stimuli 164
10.2 Computational vision 164
10.2.1 Grouping of the image 164
10.2.2 Efficiency of signal transmission on luminance and
colour-difference channels 166
xxii Contents
10.3 Synthesis 170
10.4 Caveat 170
Appendix Techniques for treatment 171
A.I Prevention of photosensitive seizures 171
A.2 Headaches and eye-strain from lighting 172
A.3 Headaches, eye-strain, and seizures from reading 173
A.4 Colour in therapy: a caveat 174
References 176
Index 187
|
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| id | DE-604.BV010118056 |
| illustrated | Illustrated |
| indexdate | 2024-12-20T09:48:19Z |
| institution | BVB |
| isbn | 019852174X |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-006718482 |
| oclc_num | 31132215 |
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| physical | XXII, 194 S. Ill., graph. Darst. |
| publishDate | 1995 |
| publishDateSearch | 1995 |
| publishDateSort | 1995 |
| publisher | Oxford Univ. Press |
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| series | Oxford psychology series |
| series2 | Oxford psychology series |
| spellingShingle | Wilkins, Arnold J. Visual stress Oxford psychology series Fatigue visuelle Manifestations oculaires des maladies ram Stress gtt Stress ram Vision, Troubles de la ram Visuele waarneming gtt Asthenopia Eyestrain Seizures etiology Visuelle Wahrnehmung (DE-588)4078921-4 gnd Stress (DE-588)4058047-7 gnd |
| subject_GND | (DE-588)4078921-4 (DE-588)4058047-7 |
| title | Visual stress |
| title_auth | Visual stress |
| title_exact_search | Visual stress |
| title_full | Visual stress Arnold J. Wilkins |
| title_fullStr | Visual stress Arnold J. Wilkins |
| title_full_unstemmed | Visual stress Arnold J. Wilkins |
| title_short | Visual stress |
| title_sort | visual stress |
| topic | Fatigue visuelle Manifestations oculaires des maladies ram Stress gtt Stress ram Vision, Troubles de la ram Visuele waarneming gtt Asthenopia Eyestrain Seizures etiology Visuelle Wahrnehmung (DE-588)4078921-4 gnd Stress (DE-588)4058047-7 gnd |
| topic_facet | Fatigue visuelle Manifestations oculaires des maladies Stress Vision, Troubles de la Visuele waarneming Asthenopia Eyestrain Seizures etiology Visuelle Wahrnehmung |
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