The Influence of Ocular Light Perception on Metabolism in Man and in Animal

1. Front Matter

   Pages i-xi

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2. Introduction

   • Fritz Hollwich

   Pages 1-2

3. The Energetic Portion of the Optic Nerve

   • Fritz Hollwich

   Pages 3-10

4. Light and the Pineal Gland

   • Fritz Hollwich

   Pages 11-16

5. Light and Growth

   • Fritz Hollwich

   Pages 17-22

6. Light and Body Temperature

   • Fritz Hollwich

   Pages 23-26

7. Light and Kidney Function

   • Fritz Hollwich

   Pages 27-38

8. Light and Blood Count

   • Fritz Hollwich

   Pages 39-54

9. Light and Metabolic Functions

   • Fritz Hollwich

   Pages 55-63

10. Light and Thyroid Function

    • Fritz Hollwich

    Pages 64-67

11. Light and Sexual Function

    • Fritz Hollwich

    Pages 68-77

12. Light and Adrenal and Pituitary Functions

    • Fritz Hollwich

    Pages 78-88

13. Natural Sunlight and Artificial Fluorescent Light

    • Fritz Hollwich

    Pages 89-91

14. Light Pollution

    • Fritz Hollwich

    Pages 92-94

15. The Importance of Light in Metabolism in Man and Animal: Summary

    • Fritz Hollwich

    Pages 95-97

16. Back Matter

    Pages 98-129

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This book was written to show that light is a primal element of life. All life originates and develops under the influence of the light of the sun, that "super­ terrestrial natural force" (Goethe). Sunlight influences the vital processes not onlyofthe plant (e. g. , heliotropism, photosynthesis) and the animal (e. g. , color change, maturation of the gonads) but of man as well. The human organism too reacts "heliotropically," as the 24­ hour rhythm of the sleep-waking cycle demonstrates. of Artists have always perceived clearly the intensive stimulatory effect sunlight on their activity. One is reminded here ofCesare Lombroso, who wrote to his daughter "that thoughts come in the greatest profusion when (my) room is flooded with the sun's rays. " Richard Wagner exclaimed: "Ifonly the sun would come out, I would have the score finished in no time. " Bernard Shaw had a little cottage where he worked that could be turned according to the position of the sun. The composer Humperdinck wrote: "The sun is indispensable for my work; that is why it is important for me to have my study face east or south. " As these few examples indicate, it is above all those active in the arts who intuitively grasp the positive influence of sunlight on the psycho-physical effi­ ciency of their organism. In an age, however, when fluorescent lighting turns night into day, we are in danger of forgetting that man is a creature of nature as well as of culture.

• Biorhythmus
• Hydra
• Licht
• Stoffwechsel
• age
• blood cell
• development
• invertebrates
• metabolism
• perception
• retina
• sleep

• University of Muenster, West Germany, München 40, West Germany

  Fritz Hollwich