Yes, most of the time. Seeing an eye is not uncommon as it is part of the social triangle, including the nose. I believe that when you are viewing with your minds eye you are viewing the subconscious area of your brain. The sub conscious has its own language and it converses is in images. This area is where memories are stored and is also the area of psychic senses i believe. Being that you see many sets of eyes in a day it could be just a memory from your past, which would be the scientific approach though those that lend toward the spiritual existance may equate it to the psychic centre. I dont know of any sure way of knowing if its a memory or from the psychic senses and its not a question that i would want to answer with any certainty.