@ellerbracke Worsening vision seems to come with age...If you are getting regular eye exams with your optometrist, who has a chart of your history, and being checked each time for cataracts, glaucoma and other issues, you should be good.
On the other hand, if you have diabetes, circulatory issues, or other high risk conditions, you should be under the care of an ophthalmologist. Or if you are concerned about your declining vision, you may want to see one at least once to rule out issues.
Sue