***** *****BB60 lenses - Transparent lenses with 12 layer yellowish coating. 100% UV protection. *****Test via the spectrometer (the performance of blue light blocking): block 35% within 500nm, block 42% within 490nm, block 49% within 480nm, block 55% within 470nm, block 60% within 460nm, block 64% within 450nm, block 67% within 440nm, block 77% within 430nm, block 97% within 420nm, block more than 99% within 400nm-410nm. *****20% color distortion due to 30% blue color was filtered out. *****The lenses block 30% blue color of online test for color filtering properties. Please check BB90 and BB98 lenses if you need block more blue color and blue light. *****PRODUCTS DIMENSION - Frame material is Acetate, Lens width about 2 1/16 inches (52mm), Frame width about 5 7/16 inches (138mm), Lens height about 1 5/16 inches (34mm), Frame height about 1 1/2 inches (38mm), Bridge (DBL) about 1/2 inch (13mm), Temple length about 5 5/16 inches (135mm), with Spring Hinges, Lenses is Aspheric, fit medium