Hello Scott and welcome!! Just about neighbors! haha!!
My Daisy has one eye. The other one was removed prior to me getting her. I was told she had a dry eye which was very painful. So instead of her induring the pain, they removed the eye.
She gets along just fine without it.
I have heard of other yorkies having eye problems, don't know if it is something to be concerned about or not. I am sure our resident specialists on yorkie health will be able to answer that.

I am just a novice.