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ISO 12312-2:2015(en)
Eye and face protection ? Sunglasses and related eyewear ? Part 2: Filters for direct observation of the sun
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Table of contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements and associated test methods
4.1 Transmittance
4.2 Material and surface quality
4.3 Mounting
5 Labelling
Annex A Use of filters for direct observation of the sun
Annex B Solar eclipse eye safety: User?s guide[23]
Bibliography
Tables
Parts
Available in:
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Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISO's adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 94, Personal safety ? Protective clothing and equipment, Subcommittee SC 6, Eye and face protection.
ISO 12312 consists of the following parts, under the general title Eye and face protection ? Sunglasses and related eyewear:
  • ? Part 1: Sunglasses for general use
  • ? Part 2: Filters for direct observation of the sun

1   Scope

This part of ISO 12312 applies to all afocal (plano power) products intended for direct observation of the sun, such as solar eclipse viewing.
Information on the use of filters for direct observation of the sun is given in Annex A and Annex B.
This part of ISO 12312 does not apply to the following:
  • a) afocal (plano power) sunglasses and clip-ons for general use intended for protection against solar radiation;
  • b) eyewear for protection against radiation from artificial light sources, such as those used in solaria;
  • c) eye protectors specifically intended for sports (e.g. ski goggles or other types);
  • d) sunglasses that have been medically prescribed for attenuating solar radiation;
  • e) prescription sunglass lenses.

2   Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
  • ISO 12311:2013, Personal protective equipment ? Test methods for sunglasses and related eyewear
  • ISO 4007, Personal protective equipment ? Eye and face protection ? Vocabulary

3   Terms and definitions

For the purposes of this document, the terms and the definitions given in ISO 4007 apply.
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Bibliography

[1]T.J. White, M.A. Mainster, P.W. Wilson, J.H. Tips Chorioretinal temperature increases from solar observation. Bull. Math. Biophys. 1971, 33 pp. 1?17
[2]D.H. Sliney, M.L. Wolbarsht Safety with Lasers and Other Optical Sources. Plenum Publishing Corp, New York, 1980, pp. 201?15.
[3]M.A. Mainster Eclipse safety. Ophthalmology. 1998, 105 1 pp. 9?10
[4]American Conference of Governmental Industrial Hygienists Worldwide (ACGIH), TLVs® and BEIs® Based on the Documentation of the Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices, ACGIH, Cincinnati, Ohio, 134-147, 2010
[5]M. Hietanen Ocular exposure to solar ultraviolet and visible radiation at high latitudes. Scand. J. Work Environ. Health. 1991, 17 pp. 398?403
[6]T. Okuno Hazards of solar blue light. Appl. Opt. 2008, 47 16 pp. 2988?2992
[7]R.V. Karandikar Luminance of the sun. J. Opt. Soc. Am. 1955, 45 6 pp. 483?488
[8]B.R. Chou Safe solar filters. Sky and Telescope, 1981 62(2), 119 pp
[9]B.R. Chou Eye safety during solar eclipses ? Myths and realities. In: Z. Mouradian and M. Stavinschi, eds.,?Theoretical and Observational Problems Related to Solar Eclipses,? Proc. NATO Advanced Research Workshop. Kluwer Academic Publishers, Dordrecht, Germany, 243?247, 1996
[10]B.R. Chou Solar filter safety. Sky Telescope. 1998, 95 2 p. 119
[11]B.R. Chou, M.D. Krailo Eye injuries in Canada following the total solar eclipse of 26 February 1979. Can. J. Optom. 1981, 43 p. 40
[12]L.V. Del Priore Eye Damage from a Solar Eclipse. In: Totality,Eclipses of the Sun, (M. Littmann, K. Willcox, F. Espenak eds.). Oxford University Press, New York, 1999, pp. 140?1.
[13]J.C.D. Marsh Observing the Sun in safety. J. Brit. Astron.Assoc. 1982, 92 p. 6
[14]M. Michaelides, R. Rajendram, J. Marshall, S. Keightley Eclipse retinopathy. Eye (Lond.). 2001, 15 pp. 148?151
[15]J.M. Pasachoff 1998: ?Public education and solar eclipses.? In: L. Gouguenheim, D. McNally, and J.R. Percy, Eds., New Trends in Astronomy Teaching, IAU Colloquium 162, (London), Astronomical Society of the Pacific Conference Series, 202?204
[16]J.M. Pasachoff Field Guide to the Stars and Planets. Houghton Mifflin, Boston, Massachusetts, Fourth Edition, 2000, 578 p.
[17]J.M. Pasachoff Public Education in Developing Countries on the Occasions of Eclipses. In: Astronomy for Developing Countries, IAU special session at the 24th General Assembly, (A.H. Batten ed.). 2001, pp. 101?6.
[18]J.M. Pasachoff, M. Covington Cambridge Guide to Eclipse Photography. Cambridge University Press, Cambridge, New York, 1993, 143 p.
[19]R. Penner, J.N. McNair Eclipse blindness?Report of an epidemic in the military population of Hawaii. Am. J. Ophthalmol. 1966, 61 pp. 1452?1457
[20]D.G. Pitts Ocular Effects of Radiant Energy. In: Environmental Vision: Interactions of the Eye, Vision and the Environment, (D.G. Pitts, R.N. Kleinstein eds.). Butterworth-Heinemann, Toronto, Canada, 1993
[21]M.D. Reynolds, R.A. Sweetsir Observe Eclipses, Astronomical League, Washington, DC, 1995, 92 pp
[22]P.C. Sherrod A Complete Manual of Amateur Astronomy. Prentice-Hall, 1981, 319 p.
[23]B.R. Chou ?Solar Eclipse Eye Safety? in F. Espenak and J. Anderson Annular and Total Solar Eclipses of 2010. NASA/TP-2008-214171. National Aeronautics and Space Administration, Greenbelt, MD. 2008, 20771 pp. 65?67