The screwless hinges guarantee the hinge's firmness

38 inches(approx

Lens height about 1 15/15 inches (49mm)

Lens height about 1 3/4 inches (44mm)

COMPUTER READING GLASSES - Blue light blocking computer reading glasses can reduce eyestrain when you are working on computer

Stylish Chic Oval Blue Light Computer Reading Glasses 1-CG071 Color:Blue The screwless hinges guarantee thePROTECT YOUR EYES Anti glare lens coating prevents insomnia and macular degeneration. Low blue light glasses provide computer eye strain relief & alleviate dry eyes & relief headache when using your T. V., smartphone, tablet or PC gamer equipment. BLOCKING OVER 30% BLUE LIGHT Blue light blocking technology naturally blocks out the recommended 30% of blue light rays: do not settle. Protect your eyes with the best blue light blocking glasses money can