“Does farsightedness get worse with age?”

You may have latent hyperopia. You were always farsighted, your natural lens loses accommodation as you age.

At your age, you should have a relatively stable “refractive error” ie farsightedness. However you may be noticing your vision struggling due to a more common problem which is the slow loss of accommodation. It helps to understand that there are two main parts of the eye that focus the outside world onto the back of the eye- the cornea (like the front windshield of the eye) and the lens inside the eye. For someone who has perfect distance vision, the lens is then able to change shape a certain amount to go from focusing at distance to up close. Over time that lens becomes stiff, can’t change shape as well and we start to lose our near vision(ie presbyopia when we start needing reading glasses between 35 to 45). For people who are farsighted, they are not focused at distance and the eye uses up all the ability of the lens to change shape so that they can bring the distance into focus. (Unfortunately when they use up all the shape change their lens is capable of, they can’t see at near - this is why “farsighted people can typically see ok at distance but not up close). In your case you might be experiencing the lens stiffening in your eye and slowly losing the ability to over come the fact that your refractive error at distance and feel like the farsighted vision is “getting worse”

Yes, farsightedness does tend to get worse with age. Get your eyes checked regularly.

It could.

Yes, increasing to a +3.0 dioptres maximum in addition to your present reading.

No, but you'll need bifocals to help you read sometime in your mid 40's.