The Effects of Constant Light on Visual ProcessesTheodore P. Williams, Barbara N. Baker " ... And the evening and the morning were the third day ... And God made two great lights; the greater light to rule the day and the lesser light to rule the night ... And the evening and the morning were the fourth day." The First Book of Moses, called Genesis (1: 13,16,19). There was daytime and nighttime before there was a sun or a moon. An interesting thought: How long were each of those first three days? Without a sun to reckon its length, a day could have been longer or shorter than 24 hours. Animals, says Genesis, appeared on the fifth day and by that time the sun and moon were illuminating the earth, presumably in cyclic fashion and with a period of 24 hours. A good thing, too, as readers of this monograph will as certain. The papers collected into this volume are written versions of 45 minute talks given at a symposium on "The Effects of Constant Light on Visual Processes", held at The Florida State University in Tallahassee on April 25-27, 1979. The conference was supported by the Psychobiology Program and handled, logistically, by the Center for Professional Development and Public Services. It was recognized that limitations on time and funds made prohibitive the invitation of others who may be doing interesting and related work. But, our earnest hope is that what is compiled here is a good blend of "true" light-damage and "relevant related" work. |
Contents
There are Different Kinds of Retinal Light Damage | 3 |
Hormonal Influences on Retinal Photodamage | 29 |
Alterations in Muscle and Retinal Cell Structure | 51 |
Copyright | |
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a-wave albino albino rats amplitude animals exposed b-wave bleaching Cell Biol choline circadian coated vesicles cones constant darkness constant light continuous light control animals cyclic light dark adaptation days of exposure disc assembly discrimination effect estradiol experiments exposure to constant ferritin Figure Ft-C function illumination increase latency LaVail levels light adaptation light damage light exposure melanin micrographs microvilli monkeys multivesicular bodies neurons Noell normal nuclei O'Steen observed ommatidium open discs Ophthal Ophthalmol Opsin optic nerve organelles outer nuclear layer outer segments pattern period phagosomes photoreceptor cells pigment epithelium pigmented rats plasma membrane prolactin rats exposed RCS rats receptive field receptor cells region response retina retinal damage retinal degeneration retinal irradiance retinular cells rhabdom rhabdomere rhodopsin rhythmic potentials rod outer segments sensitivity shedding shown shows solar spectral spectrum SSS source studies temperature threshold turnover vesicles visual cells visual pigment wavelength