Biologic Effects of Light 2001: Proceedings of a Symposium by Wolfgang Heering (auth.), Michael F. Holick (eds.)

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By Wolfgang Heering (auth.), Michael F. Holick (eds.)

As people ventured into the 20 th century, the industrialized international locations have been faced with the scourge of rickets. even supposing solariums have been changing into universal within the early 1900s and phototherapy was once rising in popularity a result of awarding of a Nobel Prize to Finsen in 1903, it wasn't till 1921 while Hess and Unger tested that rickets might be cured through publicity to daylight that the healthy advantage of solar publicity favored. In 1941, Apperly (Cancer study; 1: 191-195, 1941) famous that the occasional elevated possibility of pores and skin melanoma used to be linked to a diminished chance of many different extra universal and severe cancers. The alarming raise within the variety of situations of epidermis melanoma, specifically cancer, has triggered nice challenge concerning the adverse function of sun in health and wellbeing. The 6th overseas Arnold Rikli Symposium at the Biologic results of sunshine used to be held in Boston, Massachusetts from June sixteenth - 18th, 2001. The aim of this Symposium was once to target the extremely popular perform of tanning both via solar or by way of synthetic gentle resources and the general impression this custom has on well-being and sickness. this system was once prepared by way of individuals of the medical Advisory Committee and my co-chair emeritus, Professor Ernst G. Jung. this system Committee geared up a good state of the art software that used to be enthusiastically obtained through the participants.

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Extra resources for Biologic Effects of Light 2001: Proceedings of a Symposium Boston, Massachusetts June 16–18, 2001

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Biometers. One has been capped to measure only the horizon-sky UVR which exposes the eye. 08 Table 3: Measured ACGIH effective UVB from the sky with a 40° cone filed of view (Source: Sliney, 1983). 46 The natural protection against overhead UVR afforded to the eye by the upper lid and brow ridge may be of little value for exposure to open-arc sources in the work place, since the source may frequently be within the normal horizontal line-of-sight. Hence greater eye protection is routinely required in industrial applications.

23. 24. 25. 26. 27. 28. 29. 30. Coroneo, MT, Pterygium as an early indicator of ultraviolet insolation: an hypothesis, Brit J. Ophthalmol 1993;, 77:734-739. Davis A, Deane GHW, Diffey BL. Possible dosimeter for ultraviolet radiation. Nature 1976; 261: 169-170. Deaver DM, Davis J and Sliney DH, Vertical visual fields-of-view in outdoor daylight, Lasers Light Ophthalmol, 1996; 7(2/3):121-125. Diffey BL. Ultraviolet radiation dosimetry with polysulphone film. In: Diffey, BL, ed. Radiation Measurement in Photobiology .

Clouds redistribute overhead UVR to the horizon sky. Mountains, trees and building shield the eye from direct sky exposure. Most ground surfaces reflect only a small fraction of incident UVR. The result is that the highest UVR exposure appears to occur during light overcast where the horizon is visible and ground surface reflection is high. By contrast, exposure in a high mountain valley (lower ambient temperature) with green foliage results in a much lower ocular dose. Other findings of these studies show that retinal exposure to light and UVR in daylight occurs largely in the superior retina (Sliney, 1998).

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