I have a two-fold question about the light-cone structure of spacetime, specifically about space-like separated events.
As far as I understand it, any two events that happen at the same time in a given reference frame are space-like separated. If so, any two simultaneous events occurring on my arm and leg are space-like separated.
What confuses me is this: If I am not mistaken, all the events that we perceive are in our past light-cones. This is because we only perceive events that have emitted light that has reached us, and thus has causally affected us. If so, what happens when I look at my arm and leg? It seems to me that for any two simultaneous events A and B, where A occurs on my arm while B occurs on my leg, A and B must be time-like (since I have perceived them) and not space-like separated. In a nutshell, if simultaneous events are space-like separated, while I only perceive time-like separated events, how can I perceive simultaneous events?
And second, could someone recommend me an article or a book explaining how the light-cone structure relates to ordinary perception? I struggle to connect the light cone structure to real-life events, so some kind of graph or an explanation of this would be useful.