Bible Dictionary
OPEN
To open means to uncover, unclose, or make accessible, whether referring to eyes, mouths, doors, heavens, or understanding. Scripture also says that all things are laid open before God.
Biblical Usage
Biblical usage includes eyes opened in visions, mouths and doors opened, and the heavens opened. Hebrews says that all things are laid open before God, using an expression literally associated with having the neck bent back or being exposed.