Is it normal for someone to have visual problems as he ages (other than nearsightedness)?

It may be. There are certain visual changes that commonly occur as we age: presbyopia (need for readers), cataracts (loss of clarity of the natural lens), dry eyes and floaters. It is often hard to know whether a visual problem you are experiencing is normal or something serious. So as a rule, if you experience any visual changes, regardless of your age, please have them evaluated.
No. In general, the main aging problem around age 40-45 is difficulty with near work (presbyopia) where reading glasses are needed. The most common age related vision problem is cataracts, but a complete eye exam bu your ophthalmolgist, and regular check ups will reveal any problems.