Brief Contents

Prologue The watch 1

1. The chase 6

2. Eyes 20

3. Retinas 36

SIZE 57

4. The rain of photons onto cones 68

NEURONS 89

5. A cone pathway 102

6. The rain of photons onto rods 122

7. Night and day 134

PLOTTING LIGHT INTENSITY 151

8. How photoreceptors work 158 RHODOPSINS 158

9. Retinal organization 194

10. Photoreceptor attributes 210

11. Cell types 224

12. Informing the brain 266

13. Looking 292

14. Seeing 326

Epilogue Ignorance 361

TOPICS 367