I once got within 30/35 yards of 2 doe and a 4 point by duck walking and clucking with a turkey call. I had seen them at about a hundred yards and kept cover between us for the first 40/50 yards, then started my experiment. I would cover about 5 yards, the deer would stop feeding and stare at me, and I would cluck my call, and they would go back to feeding. I got within pistol range, stood up, and they flagged me. It was the day before season opened, so I was just seeing how this idea would work. And yes, we made eye contact every time they checked me out. Contrary to the belief of many, deer have poor eyesight as far as distinguishing objects, and they are color blind. Their eyes are tuned to see movement above all. If you think it is eye contact, it is highly doubtful. They are staring to see if you move, and if you so much as blink, they might see it depending on distance. I have looked many deer "in the eye", so to speak, and at close range, and then killed them when they looked elsewhere.