"Look forward mirror" for use following eye surgery (head-down positioning)

This is something that could be very useful for anyone who has had a form of eye surgery called vitrectomy, which is done to fix a detached retina or a macular hole. The patient has to follow up the surgery by having to lie or sit face down for several days - very boring!
This little variation on a periscope was put together to allow a family member to see forward when her head was facing down - the user looks down into the device and can see the TV, or other people. The user will see everythi