Diseases like this typically internally spread out along the ophthalmic division of the fifth (trigeminal) cranial nerve, having breached the blood-barrier rath

Diseases like this typically internally spread out along the ophthalmic division of the fifth (trigeminal) cranial nerve, having breached the blood-barrier rather than the blood-ocular barrier. To have it show up in the eye repeatedly may simply indicate it’s travelled back down the nerve. The pathway is not even rare, so I wonder what is newsworthy here. e.g. 500k Americans live with herpes simplex keratitis (or “eye herpes”) though many don’t realise, and you don’t see that on HN frontpage.