Answer:
Angels and pilots work with me.
I always have to work with something in my eye. What am I?
Iām white; perfect for cutting & grinding. For most animals I am a useful tool.
I'm really blue but when you see me I'm red. You don't see me too often. I'm there for you if you're hurt.
I do not contain flesh feather or scales; yet I have fingers and thumbs.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?