It is often said that we basically live in the past, since it takes time for light to travel from objects to our eyes and we perceive the world as it was. If we measure the distance and speed of light we can discover by how much are we 'living in the past', or when did some event happen according to our frame. Now the problem here is that this is clearly valid for an inertial frame, but what happens in real life on Earth, since we aren't in an inertial frame. Our eyes are also undergoing non-inertial motion. So how do we use the same method in real life to discover when did some event happen by subtracting the time that light took from an object to our eyes, since each space point of our eyes may have a different meaning of simultaneity? What is the criteria?