Blue-light transmittance in sunglasses over long-term irradiation within a solar simulator

High-energy visible light (commonly referred to as blue light) transmittance in sunglasses plays an important role eye safety. Current standards do not have specific requirements for ocular protection, the past. However, literature has warned against potential harm caused by light. The limits imposed past state that average spectral transmission 380–500 nm range should be 20% excess of luminous 380–780 range. on evaluations blue-blocker and their aging processes is scarce. Thus, addition sunglasses, this study investigates these transmittances before after artificial lenses a solar simulator. Twelve samples were artificially aged within simulator period 2500 h, which compatible with user wearing them 2 h day years. measured every 25 assess time evolution blue-blocking protection lenses, evaluated current old standards. results showed there relevant changes over time; is, they considerably weakened attenuation capabilities. during process, some exhibited increased compared one, exceeding 120% criterion established superseded standard. suggest tests performed only ultraviolet radiation, required most standards, but also Furthermore, include constraints attenuation. In context public health preventive medicine, evaluation blockers from various perspectives ongoing interest.