using point at for the eyes is good if your camera is set up far enough from the figure, if its up close you need to dolly the camera back and use the zoom function (this is also important to avoid focal length distortions. if the camera is too close and you use the eyes point at function you will end up with a crosseyed look. another good use of the point at function is to create a dummy prop and use point at on spot lights that will make the spots point at the dummy prop this will make it far easier to focus them in the scene at a specific spot.