Enjoy the benefits of having (3) focal strengths when wearing our progressive Tri-Focus® readers all day with the added protection of filtering out harmful blue light emitted by electronic devices. Tri-Focus® Blue Light (London) readers feature an elegant black demi frame which also include a case with built in microfiber cloth. Features: NOTE: Select your regular reading glass magnification when ordering Tri-Focus® blue light readers. Traditional rectangle frame design Matte black frame with demi accents Lens offers (3) focal points Blue light filtering lenses help to reduce digital eyestrain, promote better sleep, and lower your chances of AMD (age related macular degeneration) Includes case with built-in microfiber cloth Available in magnifications from 1.25 to +2.75