TITLE:
Transmittance Spectrum of Unbranded Sunglasses Using Spectrophotometer
AUTHORS:
Huseyin Gursoy, Hikmet Basmak, Hamza Esen, Ferhan Esen
KEYWORDS:
Sunglass, Spectrophotometer, Transmittance Spectrum, Ultraviolet Radiation, Visible Light
JOURNAL NAME:
Open Journal of Ophthalmology,
Vol.5 No.1,
January
29,
2015
ABSTRACT: Background: The sunglass standards are not strictly implemented in many countries except Aus-tralia. The purpose of the study was to evaluate the optical properties of unbranded sunglasses for light transmittance. Methods: Unbranded sunglasses with no information about their specifications were included. They were allocated to two groups based on their prices; the ones > 25 US$ (Group A) and the cheaper ones (Group B). Their transmittance spectrum was measured between 190 nm and 900 nm using a double beam scanning spectrophotometer. The European standard for sunglasses was used to evaluate their compliance regarding ultraviolet radiation (UVR) transmittance and minimum requirement for wearing when driving. Results: Thirty-eight sunglasses (Group A = 20 and Group B = 18) were evaluated. Four sunglasses in each group were non-compliant. Percentage transmittance of visible light was