My dentist has installed a flat screen TV on the ceiling above the patient’s chair to distract the patient from the inevitable drilling.
The surgery actually has picture windows with a great view along the wall in front of the chair but you can’t see out when the chair is tilted back.
There must be some way of projecting the real life view onto the ceiling rather than having to rely on DVDs of marine life for the relaxing effect.
Any suggestions?
JW
Since Camera Obscuras rely on (very) low ambient lighting it would be impossible for the dentist to shine a light into your mouth, or see to work in the rest of the surgery.
CCTV would work, but there might be legal implications.
Have your dentist mount a tiny video camera on the end of the drill. A real life view.
Now I’m going to have nightmares … 
Mirrors
Perhaps a periscope attached to the safety glasses??
Porn videos.
djm
Gas.
Yeah, just refuse the novocaine, and you will have plenty to keep you busy during the whole visit. 
I’ve had this done as another kind of doctor checked out my colon. As Artie Johnson used to say on Laugh In, “Veddy interesting.” 
Sandy