I have been feeling tired at work this past week. I could barely keep my eyes open by late afternoon.

Was it the lack of sleep? It couldn’t be, since I have been getting 8 hours of sleep every day.

Were my eyes just tired? Maybe I worked too hard this week.

Yesterday I noticed that I got some relieve if I dabbed some water around my eyes and over the eyelids, so I guessed my eyes were more dry than tired. Still, I thought the dry eyes were caused by my constant stare into the monitor at work.

This morning I woke up feeling well rested, but my eyes felt dry the moment I stepped into my office. Only then did I start to associate my dry eyes with the office construction happening near by - a lab next door is being torn down and rebuilt as offices. I guess I am sensitive to the dust.