Cars & Other Vehicles Are blue light blocking glasses effective? Are blue light blocking glasses effective? Though blue light glasses aren't effective at preventing digital eye strain, there is no harm in wearing them. “It is not harmful to wear them all day,” says Dr. Bajic.Nov 1, 2021 Related Posts:What do doctors say about blue light glasses?Why are blue light filter glasses yellow?Is it bad to wear blue light glasses all day?Does blue light blocking glasses work?