Description
Book SynopsisThis 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.
Table of ContentsPreface.- 1 Introduction.- 2 Elements of dynamic stereoscopic vision.- 2.1 Monocular dynamic visual acuity.- 2.1.1 Effects of mode of movement.- 2.1.2 Dynamic visual acuity due to eye alterations.- 2.2 Stereoscopic vision.- 2.2.1 Determination of static stereoacuity.- 2.2.2 Quality of stereoacuity.- 2.3 Dynamic parallactoscopy.- 2.3.1 Testing equipment.- 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.- 3.1.1 Binocular rotational prismometer.- 3.1.2 Test object.- 3.1.3 Testing method.- 3.2 Determination of kinetoparallactic stereoacuity.- 3.2.1 Parallactoscopometer.- 3.2.2 Test object.- 3.2.3 Testing method.- 4 Normal values of dynamic stereoacuity.- 4.1 Dynamic stereoacuity.- 4.1.1 Mean values and standard deviation.- 4.1.2 Effect of age.- 4.1.3 Effect of sex.- 4.1.4 Effect of occupational activity.- 4.1.5 Comparison between dynamic stereoacuity and dynamic visual acuity.- 4.2 Dynamic parallactoscopy.- 4.2.1 Mean values and standard deviation.- 4.2.2 Effects of age and static visual acuity.- 4.2.3 Effects of sex and occupational activity.- 4.2.4 Comparison between right and left eyes.- 4.2.5 Comparison between active and passive movement parallax.- 5 Variations of test objects and testing methods.- 5.1 Dynamic stereoacuity.- 5.1.1 Various circular movements.- 5.1.2 Variations in bar thickness.- 5.1.3 Variations in bar spacing.- 5.1.4 Variations in bar height.- 5.1.5 Depth distance of only two bars.- 5.1.6 Depth distance of two surfaces.- 5.2 Dynamic parallactoscopy.- 5.2.1 Variations in bar thickness.- 5.2.2 Variations in bar spacing and bar height.- 5.2.3 Depth distance of two and five bars.- 5.2.4 Double triangular test.- 5.2.5 Variations in image time and object speed.- 5.2.6 Variations in direction of movements.- 6 Dynamic stereoacuity in response to changes in perception conditions.- 6.1 Dynamic stereoacuity.- 6.1.1 Bilateral impairment of visual acuity.- 6.1.2 Unilateral impairment of visual acuity.- 6.1.3 Conditions of scotopic vision.- 6.1.4 Unilateral light absorption.- 6.1.5 Anisometropia.- 6.2 Dynamic parallactoscopy.- 6.2.1 Impairment of visual acuity.- 6.2.2 Conditions of scotopic vision.- 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.
