Depth and Size Post 2

I was working last night at a bar in Borgata, these ladies were talking about how they saw the fireworks from the beach and decided to walk to Borgata to have a drink. I have no idea what they were thinking but thats an easy 5 mile walk. Anyway, they were saying how Borgata looked so much closer then they had thought. It took them about 2 hours to walk from the beach to get to Borgata. I asked where they were from and they said PA, so i responded "figured." They laughed and said yeah... But this brings me to perception of depth and size from the human eye.

Size helps a person determine how far the depth is. For example, when you look at Borgata coming down the white horse pike, you know your no where near close. The building looks smaller then it does when your standing next to it. Depth plays an important part in our daily lives. From driving, putting food into our mouths, or simple as grabbing objects. If one was to lose depth, one would really see a 2D world. And if someone only sees a 2D world, they can't do anything without running into objects, or doing normal daily task like driving.

I find it interesting that depth is that important in human functioning. Ill leave you with this, if you picture our world as we see it as, 2D, humans can't drive or grab objects properly. So what could we do if we can't grasp objects because of seeing 2D?