Go with c6h6o3's advice first. Ruling out pathology, you probably have presbyopia. No, it's not some kind of religous reformation. It means "due to aging". You can probably do very well with glasses. Not to draw attention to myself, but I have profound astigmatism (top 10%) and 20/200 vision and presbiopia so I use tri-focals.
If you do find specific problems using glasses, then ask again. There are some good tips and work-arounds.