Study of the dynamic interactions between vergence and accommodation

............................................................................................................iii ACKNOWLEDGEMENTS..........................................................................................vii DEDICATION............................................................................................................ix TABLE OF CONTENTS................................................................................................x LIST OF TABLES......................................................................................................xiv LIST OF FIGURES....................................................................................................xvi 1 REVIEW OF HUMAN ACCOMMODATION AND VERGENCE............................................... 1 1.1 ACCOMMODATION AND VERGENCE ............................................................................................. 1 1.1.1 Static properties of accommodation, vergence and cross-linkages ........................................ 3 1.2 BASIC MODEL OF ACCOMMODATION AND VERGENCE.................................................................. 5 1.2.1 Static model of accommodation and vergence........................................................................ 5 1.2.2 Plant mechanics of accommodation and vergence ................................................................. 7 1.2.3 Dynamic properties .............................................................................................................. 10 1.2.4 Dynamics of disparity vergence............................................................................................ 12 1.2.5 Dynamics of blur driven accommodation ............................................................................. 16 1.2.6 Dynamics of convergence accommodation........................................................................... 22 1.3 PURPOSE AND RATIONALE ......................................................................................................... 26 1.3.1 Paucity of investigations on the dynamics of vergence-accommodation.............................. 26 1.3.2 Influence of the dynamic differences between convergence and divergence on vergenceaccommodation................................................................................................................................... 27 1.3.3 Monocular blur driven accommodation vs. open-loop vergence-accommodation............... 27 1.3.4 Instrumentation limitations................................................................................................... 28 2 DYNAMIC MEASURES OF STIMULUS VERGENCE, VERGENCE-ACCOMMODATION AND BLUR DRIVEN ACCOMMODATION ......................................................................................... 30 2.1 PURPOSE .................................................................................................................................... 30