There's a scene in a visual media you're watching that shows a needle going into a human's vein. Are you able to watch?

I have no problem watching a lab tech taking blood samples from me, so watching it in a movie or TV show is not an issue.

When I read your first post, I was wondering how cross-eyed you’d have to be to watch a needle going into your own eye. That I think I’d probably have a bit of trouble with.

I have no problem, my wife turns her head every time. I even watch it go into me when I’m getting a shot or blood draw.