PMID: 20120576Sep 1, 1979Paper

Temperature changes in contact lenses in connection with radiation from infrared heaters

Scandinavian Journal of Work, Environment & Health
P LövsundP A Oberg

Abstract

A number of reports have appeared over the past few years with warnings about the wearing of contact lenses in certain trades involving exposure to are flash. In view of these reports and in light of knowledge on the marked absorption by contact lenses, within the infrared (IR) region, temperature changes were measured in soft contact lenses under radiation from IR heaters used, for example, in the motor industry for drying paint. The lenses were tested while free-hanging and when applied to rabbit eyes. Great increases in temperature were noted with one of the heaters at a distance corresponding to "safe." During 10 min of exposure the temperature of a free-hanging lens rose from 21 to 59 degrees C, whereas the temperature in the surrounding air increased only from 26 to 30 degrees C. The final temperature of the lens was thus 29 degrees C higher than that of the air. In lenses applied to rabbit eyes the temperature rose within only 0.5, 1.0, and 1.5 min from approximately 33 degrees C to about 44, 49, and 51 degrees C, respectively; the air temperature rose from 25 to only 28 degrees C. In other words, the ultimate lens temperature was 23 degrees C higher than the ambient air temperature. In the rabbit experiments most of the...Continue Reading

Citations

Jan 1, 1990·International Archives of Occupational and Environmental Health·J Loriot, J Tourte
Nov 4, 1998·Journal of Occupational and Environmental Medicine·B R Blais
May 1, 1997·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·C G OwenE G Woodward
Jun 1, 1981·Acta Ophthalmologica·S E NilssonP A Oberg
Dec 8, 1998·Reviews on Environmental Health·T D Tenkate
Aug 1, 1982·Acta Ophthalmologica·S E Nilsson, L Andersson
Oct 1, 1983·Acta Ophthalmologica·S G NilssonL Andersson
Jan 1, 1984·Acta Ophthalmologica. Supplement·J Mäkitie
Oct 1, 1980·Acta Ophthalmologica·P LövsundP A Oberg

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