Talk to Eye Specialist on Problem With Eyes And Myopia

Good evening. I notice that in my everyday life my eyes look very tired and sleepy from the moment I wake up. It's a combination of dark circles under the eyes and my eye trying to focus even up close. I have myopia or (nearsightness) -0.5 in my left eye and -1 in my right eye and nothing else. When I wear my glasses or contact lenses this look is fixed and I look normal and healthy again. My question is this: How come I get this with such small degrees of myopia and why does this thing happen in the first place?