Face Disappearing When Imported to Unity

I have searched through multiple threads for an answer to this, but I can't seem to fix it. I am having a problem where a face in my model is disappearing upon being imported to Unity from Blender. I checked my normals, and the face's normal is going the right way. I have attached the .blend file. Any help is appreciated! The face not showing up is the left eye when you are looking at it from the front. Thank you!

Link to .blend file

 

I exported this from blender and it shows in Unity correctly.
But ! are you aware that there's too many polys on that model ?
You shouldn't have 130k tris on one model...