Why do I have to wear my glasses now to take a picture with my camera?

It sounds like the eyepiece adjustment was moved during the fall. It is easy to adjust.

You can find the instruction in the manual under:
Adjusting the Diopter
1) Flip the power switch on the rear of the camera to “On.”
2) Squeeze both sides of the eyepiece attachment and pull up to remove the eyepiece from the optical viewfinder.
3) Place your finger on the camera’s diopter adjustment to the right of the optical viewfinder. The diopter dial is labeled with ”+/-.”
4) Peer through the optical viewfinder without your eyeglasses and lightly touch the shutter button to activate the camera’s focusing screen.
5) Rotate the diopter adjustment back and forth with your finger until the text data in the viewfinder appears sharply focused for your level of vision.
6) Slide the eyepiece attachment into the grooves on each side of the optical viewfinder.

Enjoy.

You sir, are a freakin’ genius! I knew there was a wheel thing that adjusted the focusing that way, but there is another setting that is a wheel, like the diopter, only bigger. I had tried that, but it didn’t do anything, that I know of. It wasn’t the diopter, though.
Thank you thank you thank you!
I love Fluther

My pleasure. I make sure all my optics have diopter adjustments. That way they are perfectly calibrated for my eyes. It surprises me how few people bother with (or even know about) those adjustments. I mark the wheel with a touch of white-out so I can readily tell if it or I have changed over time.

What is it adjusting, btw? The mirror? And what does that other spinny wheel do? :)

The other spinny wheel goes through my menu options.

It is adjusting microscopically moving the eyepiece with respect to the image plane of the text display. Think of it like adjusting the focus on a microscope or telescope. The barrel moves in and out when you turn the focus knob.
Focusing can be mechanically adjusted two ways: moving the lens, or changing the diopter of the lens. It is much easier and cheaper to vary the position of the lens rather than changing its diopter.
As we get older most of us start to need reading glasses. They are marked in diopters: +1.00, +1.50, ... +3.00 etc. Most good cameras and optics have a way to change the eyepiece diopter so you don’t need to wear glasses. It’s all in the 100 page manual that comes with the product. But unfortunately most people don’t get past the quick start guide.

I have a very good scope on my rifle – a Leupold VX series, 3×9, gas filled. It beats any bird watching set of Nikon binoculars I own. I have adjusted the optics so I can have both eyes open and see the whole scene with my right eye and a close up of the bird with my left eye. The objective and the exit pupil are sized so that when the scope is at full power the image is slightly brighter than ambient light. that permits me to see in darker conditions. When the bird takes off I can readily track it and find it quickly when it lands. Also the rifle is much more stable than hand-held binoculars since my whole body supports it.
When in public I use my Nikon binoculars. Some people don’t understand and get nervous when they see a rifle at a bird watching event. :-)