* Blue Control Technology. Reading glasses with blue light protection (up to 41%, range 33 — 41%) emitted by a PC, tablet, smartphone, TV and LED lighting. It reduces fatigue and visual stress caused by overexposure to blue light. * Aspherical lenses that deflect light rays as required by the user and prevent image errors. * Available in diopters: -1 - 1.5 - 2 - 2.5 - 3 - 3.5. * The benefits of wearing glasses with blue light protection: Greater visual comfort, better sleep and reduced headaches * Glasses made of polycarbonate, considered the best thermoplastic material for its resistance to impacts, being the safest lens for users. * Product qualified by the Spanish Ministry of Health * Includes box, neoprene fabric cover and cotton cord