Wearing blue blockers all day, especially in the morning and daytime, is a disservice because windows filter out UVB light.

“Oh my God, that would be very bad. - A lot of people do that.”

“I'm sorry to tell you, but most windows are designed to filter out the UVB light. And if you're somebody who's really keen on blue blockers and you're wearing your blue blockers all day, well, don't wear them outside. And in fact, you're probably doing yourself a disservice by wearing them in the morning and in the daytime.”

“those indoor environments are simply not bright enough you think oh there's all these bright lights and some people are putting blue blockers on in the middle of the day which is the worst thing you could possibly do if you're going to wear blue blockers and I don't think they're necessary but if you're going to wear them you'd want to wear them at night and in the evening”