Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: Can people outside tell when you are looking at them through the viewer?  Like when a shadow is cast with a peephole.
Document: 1st off, you need a truly large hole in your door to install this, so if it doesn't work for you and you return it, there will be too large of a hole to fill with a smaller peephole viewer.I find mine to be pretty useless. I can never tell what the person at my door really looks like. I mainly see a silhouette of them.
Really love this peephole and the wide shot it gives. You can also stand back several feet while looking who is at your door. Instructions were a bit convuluted and did not like the fact that the diagram sticker is very hard to remove from the door. Overall~~good product
I saw that my husband's store installed one of these and wanted one for our house too. We have an old tudor house which had a pretty big peephole to begin with, so installing this wasn't so bad. We just had to make the hole bigger. The scope is plastic but you can't really tell by just looking. We can stand several feet away and still able to see thru the scope pretty clearly. It's an excellent product except everything is flipped. Objects on the left appeared on the right side.
I love this viewfinder. All my friends see it and get "peep hole" envy. My only problem is that I have two front doors and only bought one.Also, the image you see is like a mirror image (left/right reversed) it won't matter when looking for people. Be aware that you won't find a 3/8" hole drill in most kits, I had to purchase it separate for twenty bucks at lowes. I'd buy it again and may.
Great product for seeing outside easily. Would recommend for everyone. Install was straightforward and a breeze. Just follow the directions and it will come out looking nice.
Makes things pretty clear. So clear I can see to my neighbors front porch. It is also nice to be able to see the people outside the door with out having to be right on the door. That is good for security.
Although this item seems HUGE when it arrives, it's been a great safety feature for our home. My young teenage boys never look through our traiditional peephole before opening the door. No matter how many times I've warned them. Because of it's size, and the clarity of the screen, you can't help but see who's outside before you open the door. The inside screen is about 2" in diameter so it's not necessary to put your eye right up to it to see the person outside.
Scope works well. It is almost like having a mini-porthole in your door.I can see all the way across the street with it. Resolution is not crystal clear, but quite good. From the outside you can't see in with any resolution, but you can notice a slight change in light or color if someone comes closer to the door to look out.Comments:It sticks out about an inch from the inside of my standard door.
You cannot recognize a person at the door. You see someone there, but it is so blurry you cannot tell who it is. I am sorely disappointed.
You can see a large area with this viewer, but it's indistinct. You can see that there's a person standing at the door, but can't see their features or other details clearly. I propped it up to look through it, but haven't installed it and have no plans to.
Answer: yes