I suspect this is either a problem called vitreous floaters or a problem with the retina.
These floating spots or "black spots" are tiny pieces of the vitreous jelly that occupies a large amount of the volume of the back of the eye. This vitreous jelly, when we're born, is the consistency of a jello jiggler (thick jello). As we age it liquifies and becomes more fibrous bands and water.
Because of this liquification and the resultant fibrous bands that are left, there becomes more points of traction that the jelly exerts on the back of the eye where it is attached. As we move our eyes in different directions and as our pupils change shape, or even as we rub our eyes, some of these bands can become unattached from the back of the eye and a piece of it floats around, attached still to the rest of the jelly. These vitreous floaters do tend to happen more the older we get, but can happen at a young age.
Unfortunately, there is nothing that really can be done to definitively rid yourself of these floaters besides major surgery. Therefore, surgery to remove these floating spots is usually reserved for when they floaters are large or are significantly disrupting your vision and causing problems in your life. Thankfully, these floaters usually tend to get "better" in that either: 1) the brain learns how to ignore them, or 2) they break up somewhat, or 3) they drift out of your view.
This may also be due to a problem with the retina, such as macular degeneration or a wrinkling in the retina. Because of this, I would recommend going to see an ophthalmologist as soon as you are able to get a retinal examination to find out which of these things this may be. The incidence of macular degeneration goes up significantly after the age of 60.
Does this help address your concerns?
I am happy to be able to help you today and I would also be happy to continue to answer any more questions you have until we have resolved your concern.
Also, any positive feedback and/or bonus you may feel prompted to provide would be welcomed and is appreciated.
My opinion is solely informative and does not constitute a formal medical opinion or recommendation. For a formal medical opinion and/or recommendation you must be examined by your doctor.