These were given to me as supposedly they reduce the eye strain from looking at a computer screen. I have no idea if that is true, but they certainly don’t work for me because I wear glasses and it is not very comfortable to wear two pairs of glasses.
For anyone who doesn’t wear glasses but spends a lot of time looking at screens it may be worth a try.
Blue light glasses (Norham Manor OX2)
This offer has been gifted to someone and is no longer available.