I have a horrible fear of going blind. I just cannot imagine how the blind get by. Having to be so dependant on others, not knowing what is all around you etc. When I was a teen I was doing some work on my car and somehow got metal shavings in my eyes. Went to the hospital and had to lay there looking at a tweezer pulling things out. Then spent about a week with no sight. To have to experience that for the rest of my life, being blind, is pretty scary to me.
Next.
OMG the same thing happened to me when I first moved to NY. Some metal sliver from a construction site flew into my eye and had to have it taken out with the tweezer. It was DISGUSTING. I remember the doctor phoned me at home every day and I thought he was hitting on me until I found out that in the States doctors actually call you at home, unlike Canada, where this would never happen.
Even worse, four years later it happened again in Cape Cod... a grain of sand lodged in my eye and had to go to the ER to have the SAME procedure. It's twice the horrible when you know what to expect.
I used to take my dog Zoe to the Blind Institute for animal therapy. She loved it and so did the people there. One visit we were with an old blind and deaf guy who seemed very despondent, and when Zoe crawled on his lap, he started touching her and she licked him, and when he realized she was a dog, he actually started crying... which of course set me off, so then I did. But I don't think being blind is the worst thing in life. You can still enjoy and accomplish a lot.
Worst fear: I would hate to fall from a tall building. I get sick if I even get near a window when I'm above the 15th floor.