Blue light blocking glasses may not deliver on their promises of benefits; to maximize effectiveness, try to limit screen time and glare, consult an eye care provider first before buying such lenses, and seek their advice first. Be sure to obtain a lens testing report which details how much of the blue light spectrum your lenses block, and make sure they filter wavelengths known to disrupt sleep and cause eyestrain. Those that want to understand computer screen glasses, they will visit here.