Table of Contents
1. Introduction 1
1.1 Background to the study 1
1.2 Purpose statement 1
1.3 Research Questions 2
1.4 Research Objectives 2
1.5 Significance of the study 2
2. Literature review 3
2.1 Introduction 3
2.2 Light and the Eye: Physiological behavior 3
2.2.1 Vision: Rods and Cones 4
2.2.2 Visual adaptability and sensibility: Resolution of the eye 5
2.3 Visual comfort and influencing factors 5
2.3.1 Factors related to lighting 5
2.3.2 Factors related to context 6
2.3.3 Factors related to observer 6
3. Hypothesis 7
3.1 Null hypothesis (H0) 7
3.2 Actual hypothesis (H) 7
4. Methodology 7
4.1 Overview 7
4.2 Experimental set–up 7
4.3 Scene set up 9
4.4 Visual comfort survey design 10
4.5 Survey development 10
4.6 Procedure: 12
4.7 Mapping the scenes 13
5. Data collection 14
5.1 Challenges faced 14
6. Results and Discussion 15
6.1 Comparison of Glare responses with glare indices 15
6.1.1 Reading from paper 15
6.1.2 Reading from laptop 17
6.1.3 Typing task 19
6.2 Task based accuracy rates 21
Reading from paper 21
Reading from laptop 22
Typing Task 22
6.2 Task Difficulty 23
6.3 Effect of fatigue 23
7. Conclusions 24
8. References 26
Appendix 31
Appendix 1: Definitions of key terms 31
Appendix 2: Questionnaire form 33
Appendix 3: Literature review41
Human eye 41
Influencing factors 42
Glare metric 43
Measurement 44