Thank you for your reply. It appears that you may have early natural lens changes (early cataract) which does not significantly affect your vision, but causing localized change in your focusing. You also could changes in the gel inside your eyeball called the vitreous. The vitreous is a clear gel inside your eyeball that is attached to the surface of the back of your eye (retina). Sometimes, especially with age and with history of old injury, the gel develop pocket(s) of liquefaction within itself causing visual spots, circular patterns and in severe cases floaters and/flashes.
As mentioned already, early lens opacification (early cataract) can cause discrete areas of changes that affects light movement through the lens, manifesting as spots, and patterns of visual changes. It does not appear that you are an immediate danger. However, given your history of old injury in that eye, and age, it would to important to called your eye doctor as soon as you can this week, and get a quick eye exam to re-assure you, and exclude possible retina problem or any other problem unforeseen at this time.
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