Why do you need reading glasses? The degree of presbyopia is related to age. If you do not wear reading glasses, it will aggravate reading difficulties, produce dizziness and many other symptoms, which will affect your life and work. With age, the original reading glasses are not enough, so they should be replaced in time. FEISEDY Product Dimensions: Lens Width:57 mm/2.44 in, Lens Height:31 mm/1.22 in, Temple Length:147 mm/5.79 in, Frame total Length:129 mm/5.08 in, Nose Bridge:19 mm/0.75 in.Attention: Manual measure, there may be 1-2mm error. What is harmful blue light? Harmful blue light refers to high-energy visible light at 415-495 nanometers. It is commonly found in various light sources such as computers, mobile phones, televisions, LEDs, and fluorescent lamps. Long-term exposure will fatigue the eyes and cause vision loss. At the same time, blue light can also inhibit the secretion of melanin, interfere with the biological clock, and affect sleep. Spectacle frames: aluminum magnesium titanium alloy spectacle frames have high hardness, ultra-light, corrosion resistance, sweat resistance and good quality, etc., strong surface gloss texture, strong surface gloss texture, gentle color, making the whole Have a sense of quality. Rimless frames are suitable for all face shapes. Presbyopic lenses: use aspherical, anti-fatigue, waterproof and wear-resistant resin lenses, which have the advantages of lightness, thinness, beauty, and good light transmittance. They are not easy to fatigue and are safe and comfortable to wear for a long time.