block 64% within 450nm

The lenses do not block blue color of online test for color filtering properties

Due to the difference between different monitors

Plastic and Wood frame with spring hinges

4 Pack Two Tone Progressive Multifocal Reading Glasses M2114 Magnification Strength:+3.50 block 64% within 450nmAcrylic lens, plastic frame with spring hinges Frame width about 5 3 8 inches (136mm) Lens width about 1 15 16 inches (49mm) Lens height about 1 1 2 inches (38mm) Bridge(DBL) about 9 16 inches (14mm) Temple length about 5 5 16 inches (135mm) EYEKEEPER ONLINE PROGRESSIVE MULTIFOCUS GLASSES 5 layer anti reflective coating to minimize glare from screens and fluorescent lighting. Not only for looking far, but also for computer and looking close. (up