* Literally: Seeing is the most direct opposite.
* Figuratively:
* Seeing can still be used to describe understanding or awareness.
* Insightful implies a deep understanding.
* Discerning indicates the ability to make fine distinctions.
* Perceptive suggests a keen awareness of what is happening around you.
* Aware means being conscious of something.
The best opposite will depend on the specific meaning you want to convey.