The main problem with peep holes is that if they're installed high enough to use without breaking your back, they are also installed to high to spot little solicitors... which of course are the best kind. You could decry the situation, and ask "Where are the parents?" but the obvious answer is that they are waiting on the sidewalk, off in the hazy distance that a peep hole cannot quite resolve... if they are doing their job at all.

Instead, I propose a simple array of mirrors and lenses. The entryway pseudo-periscope has conveniently located, and height-adjustable viewing eyepieces located next to the door. From there, a series of mirrors pipes your line-of-sight up, and around, so that you can look down at the outside of your door from the exterior entryway. This will allow you to quickly, accurately, and painlessly verify whether or not there is a girl scout uniformed little waif at your doorstep, or if in fact some evil knocking door mechanism is at work.

The entryway psesudo-periscope is all analog, all mechanical, and all real-time. No frightening cameras, no film, no hard drive space, and no batteries needed to operate this simple, elegant device. Special order entryway pseudo-periscopes can be made to your demanding specifications so as to resemble chandeliers, ceiling fans, potted plants or other everyday household objects that just happen to have large blinking lenses on them.

Security minded personell can of course install a camera onto the entryway psesudo-periscope, but this is not needed for everyday operations.

Special order reverse entryway pseudo-periscopes allow you to look up from below, but must be pre-installed in new homes, and should not be used in conjunction with girl scouts. Certain restrictions apply, reverse entryway pesudo-parascopes are not available in some locations.