Is it possible that eyeballs can be to small for their eye sockets and is there some way to fix it?

Without pictures it is hard to determine exactly what you are concerned about.  However in general, the size of the eye itself does not typically change with age.  We know that facial aging includes descent of the fat pads around the eyes, loss of cheekbone volume, laxity of the lower eyelids and increase in upper and lower lid skin.  All of these things may contribute to your current concerns.  Seek consultation with a board certified plastic surgeon for a full evaluation and to address your specific concerns.