Oxcervate for TN/ATN corneal numbness

Hi there! Quick question for everyone. Has anyone tried oxcervate for corneal numbness from TN/ATN?

After 2 MVDs and 3 gamma knife procedures, I have anesthesia dolorosa and complete facial numbness on the ATN side. I have a deep brain stimulator that helps somewhat with the facial pain. But I am having a hard time managing the complications around the corneal numbness. My ophthalmologist suggested oxcervate as it is a nerve growth factor that has shown small benefits in people like me. A side effect is pain. I am concerned that the only sensation that I will feel is pain since that is what I can only feel on the rest of the side of my face.

Thanks in advance.