My SO ended up with optic nerve damage. Speaking with the neurologist, they've seen a huge uptick in cases with optic nerve damage in both eyes for older patients which is unheard of previously. When the neurologist spoke with others in the same field at a conference, the same is seen all over the world.

I asked if there have been any studies to these findings, and she said no because there's no way to pinpoint covid as the root cause since most everyone has had it.

Indeed, after long covid my wife showed heart damage too, though later scans showed noticeable improvements from her worst results.

I was just about to post that nature.com link. So much is known by researchers that isn't well known in the general public.