A practical way to adapt your readers to changing light conditions without carrying multiple pairs of eyewear

Frame width about 5 3/8 inches (136mm)

Lens height about 1 1/4 inches  (32mm)

Lens width about 21/16 inches(52mm)

plastic frame with unique flexible spring hinges

Rectangle Half-rim Blue Light Blocking Eyeglasses DS12625 feed-color-Red/Grey/Brown A practical way to adaptAcrylic lens,metal frame with spring hinges Block 98% blue light, serious color distortion Frame width about 5 5 16 inches (135mm) Lens width about 2 1 16 inches (52mm) Lens height about 1 1 4 inches (32mm) Bridge(DBL) about 5 8 inches (16mm) Temple length about 5 11 16 inches (145mm)