Volume 35, Issue 3 (11-2011)                   Research in Medicine 2011, 35(3): 163-167 | Back to browse issues page

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Department of Optometry, Faculty of Rehabilitation sciences, Shahid Beheshti University of Medical sciences, Tehran, Iran , medicalopto@yahoo.com
Abstract:   (8719 Views)
Abstract Background: Solar light has various electromagnetic radiations include Ultraviolet, Visible & infrared rays. Overexposure to solar ultraviolet radiations can lead to some dangerous disorders and usage of non standard sunglasses can increase foregoing harmful effects. In Iran cataract is the most common disorder produced by UV rays. This study aims to measure the transmission of ultraviolet (A and B) and visible rays according to standards through sunglasses provided from miscellaneous vendors. Materials and methods: In this study, 150 sunglasses were assessed by spectral transmittance meter for evaluation of the transmission of visible and ultraviolet rays. Results: In transmission of UV-A, 41.7% of brown & 42.4% of gray sunglasses could not pass defined standard criteria in transmission of UV-B, 3.8 % of brown and 11% of gray sunglasses could not pass standard criteria. Conclusion: It should be noted that, buying sunglasses from miscellaneous vendors can be dangerous and is not recommended standard sunglasses should be bought only from licensed shops. Keywords: Standard, Sunglasses, Ultraviolet.
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