my own reflection

On a normal morning, i'll take a half hour train, a 10 minute bus and 20mins walking.
Same thing when i go back except i dont have to walk that long but more waiting time and on the train ride the windows become mirror-like because of the darkness outside. So i have a good long time looking at myself through out the journey. What i want to point out is tht, the eyes reflected back, are a very empty pair of eyes. Why and for how long..