Behavior like this will one day causing "no glasses beyond this point" rule, which will also hurts people that really need to use glasses.
All things you mentioned can be easily prohibited on photo-sensitive area. Perhaps phone is harder, but it's still easily get prohibited without hurting anything. Glasses so far is a requirement, not that easy to prohibit in an area.
All things you mentioned can be easily prohibited on photo-sensitive area. Perhaps phone is harder, but it's still easily get prohibited without hurting anything. Glasses so far is a requirement, not that easy to prohibit in an area.