Comparative Evaluation of Spectral Transmittance of Some Welding Glasses with ANSI Z87.1
Background: Welding emits harmful rays to the eyes. We evaluate and compare the UV, blue light and IR transmittance characteristics of some currently available welding safety protectors with ANSI Z87.1 criteria.
Materials and Methods: Three type of welding safety protectors (three of each type) have been evaluated for spectral transmittance. One-sample T-test was performed to establish is there a statistically significant difference between the standard criteria and UV, blue and IR regions for the welding protectors (α=0.05).
Results: In ultraviolet (UV) (far and near) region, two types of the tested protectors (P1, P2) transmitted lower than the maximum allowable value specified in the standard (P<0.001). In infrared (IR) spectrum only one type (P3) transmitted lower than the maximum allowable value specified in the standard (P<0.001). In blue light region, all of the tested protectors transmitted lower than the maximum allowable value specified in the standard (P<0.001).
Conclusion: Although all of the tested glasses could meet some parts of the criteria, but none of them could meet the complete spectral transmittance requirements of ANSI Z87.1.
Chou BR, Cullen AP. Ocular hazards of industrial spot welding. Optometry and vision science. 1996;73(6):424-7.
Ajayi LA, Omotoye OJ. Pattern of eye diseases among welders in a Nigeria community.African Health Sciences. 201212(2):210-6.
Tenkate TD. Optical Radiation Hazards of Welding Arcs.Reviews on Environmental Health. 1998;13(3):131-46.
Ajayi IA, AdeoyeAO, Bekibele CO, Onakpoya OH, Omotoye OJ. Awareness and utilization of protective eye device among welders in a southwestern Nigeria community.Annals of African Medicine. 2011;10(4):294-9.
Pabley SA, Keeney HA. Welding processes and ocular hazards and new protective devices. Indian J Ophthalmol. 1984;32:347-9.
Roberts JE. Ultraviolet Radiation as a Risk Factor for Cataract and Macular Degeneration.Eye & Contact Lens. 2011;246–9.
Sliney DH. Photoprotection of the eye – UV radiation and sunglasses. Journal of Photochemistry and Photobiology B: Biology. 2001;64(2-3):166-75.
Position Statement on Ultraviolet and the Eye. AvailableAt: http://www.optometrists.asn.au/LinkClick.aspx?fileticket=LzIMeZULAnY%3d&tabid=81&language=en-US.Accessed8 Feb, 2014.
Brooks CW, Borish I M. Absorptive Lenses. System for ophthalmic dispensing. 3th Edition. Newton: Butterworth-Heinemann; 2007.
Pitts DG, Kleinstein RN. Environmental Vision. Stoneham, MA: Butterworth-Heinemann; 1993.
Voke J. Radiation effects on the eye. Part 1-Infrared radiation effects on ocular tissue.Optometry today. 1999:22-8.
Occupational Vision Manual Part III: Ocular Protection. Available at: http://www.aoa.org/optometrists/occupational-vision-manual /occupational-vision-manual-part-iii-ocular-protection?sso=y.Accessed Nov 7, 2014.
Okuno T, Saito H, Ojima J. Evaluation of blue-light hazards from various light sources. Development in Othalmology. 2002;35:104-12.
Yen YL, Lin HL, Lin H J, Chen PC, Chen CR, Chang GH, Guo HR. Photokerato conjunctivitis Caused by Different Light Sources. American Journalof EmergencyMedicin. 2004;22(7):511-5.
Ringvold A. Welding without the Use of Eye Protective Equipment. Cornea. 2007;26(5):645.
Eye Protection against Radiant Energy during Welding and Cutting in Shipyard Employment. Available at:https://www.osha.gov/Publications/OSHAfactsheet-eyeprotection-during-welding.pdf. Accessed Nov 7, 2014.
ANSI Z87.1.2010 American National Standard Practice for Occupational and Educational Eye and Face Protection. Available at: http://www.ansi.org/
Horstman S, Ingram JW. A critical evaluation of the protection provided by common safety glasses from ultraviolet emissions in welding operations. Am Ind Hyg Assoc J. 1979 Sep; 40(9):770-80.
Rahmani S, Akbarzadeh-Baghban AR, Ghassemi-Broumand M, Nazari MR. Can currently available safety eye wears protect welder’s eyes from harmful rays? Journal of Ophthalmic and vision research. In Press.