To arrive at transmittance standards for cold-weather goggles, the levels of natural radiation were estimated, and the amounts by which they must be reduced to fall below the damage thresholds for various bands of electromagneric radiation were calculated. No more than 16% of UV from 320 to 40 nm, and no more than 5% of UV from 290 to 320 nm should be transmitted. If the short wavelengths of the visible spectrum (< 500 nm) are filtered out, the remaining wavelengths appear to pose no danger. Measurements of the transmittances of a random selection of 13 commercial ski-goggles showed that most offer satisfactory protection.
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References
1.
American Conference of Government Industrial Hygienists (ACGIH). Threshold limit values for chemical substances and physical agents in the environment with intended changes for 1982. Cincinnati, OH: ACGIH1982.
2.
American National Standards Institute. American National Standard Requirements for Nonprescription Sunglasses and Fashion Eyewear. New York: ANSI, 1977.
3.
BenerP.Spectral intensity of natural UV radiation and its dependence on various parameters. In UrbachF. (Ed.), The biological effects of ultraviolet radiation. New York: Pergamon, 1969. Pp. 351–358.
4.
DeMottD. W., & DavisI. P.Irradiance thresholds for chorioretinal lesions. Archives of Opthalmology, 1959, 62, 653–656.
5.
DiffeyB. L.The calculation of the spectral distribution of natural ultraviolet radiation under clear day conditions. Physics in Medicine and Biology (London), 1977, 22, 309–316.
6.
DiffeyB. L.Ultraviolet radiation physics and the skin. Physics in Medicine and Biology (London), 1980, 25, 405–426.
7.
EltermanL.Atmospheric attenuation, 1964, in the ulttraviolet, visible, and infrared regions for altitudes to 50 km. Environmental Research Papers No. 46, Air Force Cambridge Research Laboratory, 1964.
8.
FarnsworthD.Standards for general purpose sunglasses. (NSMRL Rep. No. 140) Naval Submarine Base, Groton, CT, Naval Submarine Medical Research Laboratory, 1948 (NTIS No. AD-224528)
9.
GatesD. M.Spectral distribution of solar radiation at the earth's surface. Science, 1966, 151, 523–529.
10.
HamW. T.Jr.MuellerH. W., & SlineyD. H.Retinal sensitivity to damage from short wavelength lights. Nature (London), 1976, 260, 153–155.
11.
JaggerJ.Introduction to research in ultraviolet photobiology. Englewood Cliffs, NJ: Prentice-Hall, 1967.
12.
KokC. J., & ChalmersA. N.Special irradiance of daylight at Durban. Pretoria: National Physics Research Laboratory, 1978. (Research Rep. FIS 187)
13.
KostkowskiH. J.SaundersR. D.WardJ. F.PopenoeC. H., & GreenA. E. S.New state of the art in solat terrestrial spectroradiometry below 300 nm. Optical Radiation News No. 33, National Bureau of Standards, 1980.
LangleyR. K.MortimerC. B., & McCulloughC.The experimental production of cataracts by exposure to heat and light. Archives of Ophthalmology, 1960, 63, 473–488.
16.
LanumJ.The damaging effects of light on the retina: empirical findings, theoretical and practical applications. Survey of Ophthalmology, 1978, 22, 221–249.
17.
MoonP.The scientific basis of illuminating engineering. New York: McGraw-Hill, 1936.
18.
PittsD.A comparative study of the effects of ultraviolet radiation on the eye. American Journal of Optometry, 1970, 47, 535–546.
SlineyD. H.MossC. E.MillerC. G., & StephensJ. B.Semitransparent curtains for control of optical radiation hazards. Applied Optics, 1981, 20, 2352–2366.
21.
SperlingH. G.Functional changes and cellular damage associated with two regimes of moderately intense blue light exposed in rhesus monkey retina. ARVO meeting, Sarasota, FL, 1978.
22.
SperlingH. G. (Ed.) Intense light hazards in ophthalmic diagnosis and treatment. Vision Research, 1980, 20, 1033–1203.
23.
SykesS. M.RobinsonW. G.Jr.WaxlerJ., & KuwabaraT.Damage to the monkey retina by broad-spectrum fluorescent light. Investigative Ophthalmology and Visual Science, 1981, 20, 425–434.
24.
WolbarshtM. L.Safe ocular levels for IR occupational exposures. Final Report Grant No OH 0053-04, National Institute Occupational Health and Safety, 1978.
25.
WolbarshtM. L.OrrM. A., & MathesonI. B. C.The origin of cataracts in the lens from infrared laser radiation. Progress report, U. S. Army Medical Research and Development Command, Washington, DC, 1979. (Contract DAMD-17-74-C-4133)
26.
WolbarshtM. L.OrrM. A.YamanashiB. S.ZiglerJ. S., & MathesonI. B. C.The origin of cataracts in the lens from infrared laser radiation. Annual Progress Report, U. S. Army Medical Research and Development Command, Washington, DC, 1977. (Contract DAMD-17-74-C-4133)
27.
WyszeckiG., & StilesW. S.Color science. New York: Wiley, 1967.
