If I recall, for the doctor setting, all that was required for compliance was the patient sign a consent form permitting the care-giver's use of the Google Glas

If I recall, for the doctor setting, all that was required for compliance was the patient sign a consent form permitting the care-giver's use of the Google Glass device which they kept on file. In addition, the doctor would ask the patient at the time of each encounter if they consented for video to be turned on for that session. The doctor then turned on the Glass only after the patient consented. One of the early problems in the doctor's office setting was the battery charge especially when the doctors run busy schedules with back-to-back appointments. I believe this was solved by providing them with an additional battery pack they could clip to their waist while the other pack was charging. source: I worked with a startup in this space several years ago.