I didn't feel anything. I don't have any sensation in my left eye. The entire left side of my face including my left eye is completely numb except for an uncomfortable tingling sensation.

It isn't very common but I had complications after surgery for trigeminal neuralgia. I wasn't supposed to have any facial numbness after my microvascular decompression (MVD) surgery. No mistakes were made. The neurosurgeon said he did the best he could under the circumstances. He said the odds of finding the problem I had were astronomical. The pre-op MRI didn't reveal the nature of the problem. I was just grateful the pain of trigeminal neuralgia stopped and I can live with the facial numbness.
https://pmc.ncbi.nlm.nih.gov/articles/PMC5849951/
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About 5 years after my MVD surgery I went for a "routine eye exam" and my ophthalmologist informed me I had a corneal defect that must have opened up spontaneously. I didn't remember any injury to my left eye. She said the defect should have been extremely painful and was incredulous that I didn't feel anything.

It was incredible how my regular ophthalmologist reacted but I didn't feel anything. A couple other ophthalmologists looked at my eye but eventually a cornea specialist was called. The cornea specialist recommended the ASEDs because none of the other ophthalmologists were sure what to do.

I didn't feel any different 6 months later after the corneal defect closed. I was happy the defect closed though. The talk about a "corneal meltdown" was very scary.
https://iovs.arvojournals.org/article.aspx?articleid=2767790