Yesterday, I went for a full retina check, something I'm told I should now do every year. I'm very nearsighted, or myopic, which is a big risk of retinal detachment--it means my eyeball is a long oval instead of being round. My father had a detached retina in his early 80s.
The fact that I get hit in the head in sparring--ideally, not super hard, but mistakes happen--and that in grappling I'm straining my muscles, adds to the risk.
The doctor said my retinas look fine for now, but that I should beware of any warning signs of detachment--loss of peripheral vision, floaters, showers of sparks in my vision--and in that case call him immediately. He said he thinks it's okay for me to continue my martial arts as a quality of life thing. If I had lost vision in one eye, he'd say I shouldn't.
My eyes were still way dilated a few hours later when I went to sparring class. (It was very freaky looking.) Moreover, I've still got a strained shoulder and groin muscle.
So once drills were through, I didn't participate in free sparring, I went over to a heavy bag and worked on combinations.
Yesterday, I bought a 100-pound heavy bag and hung it from a rafter in the basement. This morning, I went out for a two-mile run at the high school track (much easier on the feet than pavement).