Originally Posted by FML123

In 2020 I was 56-years old, living in Frankfurt, Germany. I’d been riding a hardtail MTB up a 5mi fire road and back down. I reached about 30-35mph for much of the descent.
At some point (let’s call it Day 0) I rode my carbon CX bike w/35mm tires up the fire road and back down. I did experience a lot of vibration in my vision on the way down. The next day (Day 1) I experienced some large swaths of fluid black patches, sort of as if looking at a lava lamp with black fluid inside. On Day 2 I was diagnosed with a detached retina and had emergency retina reattachment surgery that day. No one can prove that riding a rigid gravel bike on a bumpy fire trail was the cause, but I tend to believe it was the last straw in my middle-aged body.