Matthias Sachsenweger, Ulrich Sachsenweger

Stereoscopic acuity in ocular pursuit of moving objects (eBook, PDF)

Dynamic stereoscopy and movement parallax: relevance to road safety and occupational medicine
Übersetzer: Ghantus, W.

• Format: PDF

Produktbeschreibung

There has been growing acceptance of the insight that the methods so far used in the testing of visual functions have been inadequate when it comes to specific problems and should, therefore, be supplemented with more specialised methods for dynamic testing. As long as two decades ago, large-scale mass screening produced evidence to the effect that visual acuity, so far exclusively determined by means of still samples, was not identical with visual acuity in the ocular pursuit of moving targets (dynamic visual acuity). In other words, vision testing can, at present, provide little informa tion on an individual's capability of identification, appreciation, and judge ment of mobile objects. Spatial, three-dimensional perception of moving targets, hereafter re ferred to as dynamic stereoacuity, is the particular subject on which findings are reported in this article. Findings of that kind are of considerable relevance to everyday life, since many of the phenomena that have to be three-dimensionally perceived in private life and in occupational practice, are in movement. So far, dynamic stereoacuity has never been systematical ly studied and is still a blank space on the maps of ophthalmology and physiology. This is equally true for dynamic stereoscopy in binocular vision as well as for perception on the basis of movement parallax, a phenomenon of differentiated contour displacement within a given field of vision which is also available to the monocular individual under conditions of head or body or object movement within the visual space.

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Produktdetails

• Verlag: Springer Netherlands
• Seitenzahl: 136
• Erscheinungstermin: 6. Dezember 2012
• Englisch
• ISBN-13: 9789401125727
• Artikelnr.: 43983589

Autorenporträt

Matthias Sachsenweger lebte 30 Jahre in Leipzig und ist jetzt niedergelassener Augenarzt in Landshut und Professor an der LMU München. Neben zahlreichen medizinischen Publikationen hat er sich auch mit der Leipziger Stadtgeschichte und religiösen Fragen beschäftigt.

Inhaltsangabe

Preface.- 1 Introduction.- 2 Elements of dynamic stereoscopic vision.- 2.1 Monocular dynamic visual acuity.- 2.2 Stereoscopic vision.- 2.3 Dynamic parallactoscopy.- 2.4 More empirical factors of stereoscopic vision.- 2.5 Dynamic vision.- 3 Equipment and methods for testing dynamic stereoacuity.- 3.1 Determination of dynamic stereoacuity.- 3.2 Determination of kinetoparallactic stereoacuity.- 4 Normal values of dynamic stereoacuity.- 4.1 Dynamic stereoacuity.- 4.2 Dynamic parallactoscopy.- 5 Variations of test objects and testing methods.- 5.1 Dynamic stereoacuity.- 5.2 Dynamic parallactoscopy.- 6 Dynamic stereoacuity in response to changes in perception conditions.- 6.1 Dynamic stereoacuity.- 6.2 Dynamic parallactoscopy.- 7 Effect of psychosensorial factors.- 7.1 Fatigue.- 7.2 Effect of psychosedatives.- 7.3 Effect of hypnotics.- 7.4 Short-time and long-time exercises.- 7.5 Asthenopia.- 8 Comparison between dynamic and kinetoparallactic stereoacuities.- 9 Conclusions.