Vintage Round Blue Light Blocking Computer Glasses Eyeglasses TR90 Product Features Imported TR90 frame Composite lens non-polarized Lens width: 49 millimeters Lens height: 43 millimeters Bridge: 19 millimeters Arm: 143 millimeters MATERIAL - Using high quality TR90 materials, passed CE certification,more light weight and flexible.No easy to break. It can effectively prevent the damage to the eyes and face caused by the fracture and friction of the eyeglasses frame in the movement. FASHION AND TRENDY DESIGN – This unisex eyewear frames with double-circle lenses are available with multiple colors: funky black, transparent nifty pink, space transparent grey and elegant purple. We take pride in creating beautiful eyewear styles, which are the combination of fashion design elements and advanced durable materials for everyone. PRODUCTS DIMENSION - Lens width:49mm , Frame width:135mm, Lens height:43mm, Bridge (DBL): 19mm, Temple length: 143mm . Please check frame size on the left picture carefully to make sure the glasses will fit you well. PRACTICAL – You can wear it as a fashion accessory. Of course, you can also replace these lens with your own prescription lens.?Attention:The non-blue light lens has the words printed on it for display, which is difficult to remove. If you are wearing it directly, please do not choose, thank you!? RESPONSIBLE AFTER-SALE SERVICE- In case of any problems within 2 months, please contact with our customer services without hesitation. We will provide the best solutions until the customer is satisfied. You have no risk to try! Product Description Hazards of Blue Light Blue wavelengths are beneficial during daylight hours because they boost attention, reaction times and mood. According to Harvard Health, blue light wavelengths suppress the body’s secretion of melatonin, the hormone that regulates your sleep-wake cycles. So, exposure to blue light at night continues to alert your brain that it is daytime, disrupting your body’s natural circadian rhythm.Blue light can contribute to digital eye strain. With its short, high-energy wavelengths,when looking at electronic devices that emit significant amounts of blue light, the unfocused visual “noise” reduces contrast, which can lead to digital eye strain.Over time, blue light can also have lasting physical effects. Because blue wavelengths reach further back into the human eye, prolonged exposure over time can cause damage to the retina. WHAT YOU GET Reading Protect your eyes from daily life and electronic products. Working Protect your eyes from daily life and electronic products. Sleeping Minimized the headache and enjoy a good sleep for a whole night. ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Our stock all ships from our US-based warehouses.Shipped via UPS or USPS(depending on location and package weight) Unless stated otherwise, all orders will ship within 24 hours of your payment being processed.Check our feedback to see the great reviews of FAST shipping we offer.Shipping is always FREE If you are not 100% satisfied with your purchase, you can return the product and get a full refund or exchange the product for another one, be it similar or not. You can return a product for up to 30 days from the date you purchased it. Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. If you have any queries, please contact us via eCRATER. We usually respond within 24 hours on weekdays. Thank you for visiting our eCRATER store!