Even if you're really sure you have enough financially on which to retire--as a great American philosopher once said, It's tough to make predictions, especially about the future, and it may be that your vision problems suggest growing medical expenses--a problem you might encounter is changing your mind about retiring after you've done so.

I retired at about your age, and then I decided I'd rather work, just in a different career field. I picked up all five of Cisco's baby certifications in networking, and found I couldn't get a job in networking--I was too old to be hired on as a beginner. I switched "career fields" again, and now I write. It's a good thing I really was, so far, the financially independent part of FIRE; I couldn't live on the royalties. Now I write mostly to leave something behind for my grandkids.

Eric Hines