Almost everyone nowadays spends an inordinate amount of time looking at phone and computer screens, and there are examples in modern medical literature of consequent physical harms. How long can it be before a new disease is discovered (Dalrymple calls it Screen Separation Anxiety)? With all the attendant legal issues, of course.
…it would be easy to list the criteria for the diagnosis of SSM in the normal manner of the DSM: Severe or incapacitating anxiety on being separated from screens for more than two hours, with at least three of the following: a) Excessive time spent looking at screens (except for work); b) Reduced normal social interaction because of time spent looking at screens; c) Inability to concentrate on anything except a screen; d) Preference for screens over all other activities; e) Anger at suggestions that less time should be spent looking at screens; f) Inability to refrain from looking at screens when one or more is nearby.
AND at least one of the following: 1) Serious interference with social or work performance; 2) Insomnia caused by proximity of screens consulted through the night.