Is it my contacts?

There are just days that I seem to be utterly exhausted. And the exhaustion seems to really be in my eyes, but I feel tired. Does that make sense. And I've been thinking about it & it seems that this exhaustion happens on the days that I wear my contacts all day. Weird, or am I on to something? Is it even possible that the contacts could be making my eyes so very tired? I don't know. After I took my contacts out & put my glasses on, I seem fine. Tired, but not the exhaustion that I felt earlier. Just thought I'd throw this thought out there. If anyone has any input or is an opthamoligist (eye person) can't spell it, let me know what ya think would ya!