The majority of commercially available corrective spectacles used by workers do not provide effective eye protection against mechanical hazards in the workplace. One of the risks commonly occurring during work is hitting the head on some protruding elements, such as components of machines, buildings or tree branches in a forest. Because of the considerable weight of the human head and the speed of movement during impact, this type of accident may be very serious. This article presents a method of testing the mechanical strength of corrective lenses, simulating the results of an impact of the head on elements of workplaces. The results of tests of commercially available materials used for the construction of corrective and protective spectacles are also presented and discussed.
The purpose of high visibility products is to reflect light at a low angle towards the source, such as vehicle headlights. The article presents measurements of the photometric properties of selected retroreflective materials made either of microlenses on a textile base or microprisms on a polymer base. The effects of the structure of the textile and polymer layers on the photometric properties of high visibility materials is analysed and the test methods applied are described.
Over 800 pedestrians are killed in road accidents in Poland every year. Inadequate visibility, especially at night, is a main cause of these accidents. Retro-reflective accessories, which reflect the light of car headlights towards their source are effective in improving road workers’ and pedestrians’ visibility.
This article discusses the legal requirements for marketing retro-reflective accessories, for their construction, limitations in use and technical requirements set out in a European standard.
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