Contents

Pretext

vii

1   

Visions of vision

1

2   

Light

14

3   

Eye

24

4   

Brain

67

5   

Seeing brightness

84

6   

Seeing movement

98

7   

Seeing colours

121

8   

Learning how to see

136

9   

Realities of art

170

10   

Illusions

194

11   

Speculations

244

Bibliography and notes

256

Index

269