whts necessary to have a good vision

Have you ever observed that, often when you wake up from sleep, or a short nap, you are seeing things more clearly for a small duration. A fine sleep relaxes your mind and whole body.Eyes are directly related to mind's status. If you will take a relaxed sleep, so like your eyes. Try to have atleast 7 hours sleep. Or a short can be ok if it is fulfilling the body needs. Sleeping till late morning produces heat in body that affects the eyes badly. I am not sleeping well from last 2 days nd its reflecting in my eyes. I'm managing to have a short nap in my office