What the Bible says about God's Sovereignty over Vision and Sight
(From Forerunner Commentary)

Isaiah 45:7 To worship God “in spirit and truth” (John 4:24) requires us to refine our concept of Him continually based on what Scripture teaches, which at times necessitates challenging our preconceptions. Due to this reality, God's actions at times make us uncomfortable. When a recorded deed or attribute of God does not fit our ideas, we tend to hurry past such disconcerting passages rather than allow the holy and pure Word of God to mold our minds. One act of God that may seem ungodlike is that He blinds. More precisely, God exercises sovereignty over both physical sight and spiritual vision—that is, understanding. At times, He removes literal or metaphorical sight as He works out His purpose. David C. Grabbe Spiritual Blindness (Part One): The God of This World Related Topics: Blinding is Exclusively in God's Domain | Blinding is Solely God's Prerogative | Blinding Spiritually | God Removes Wisdom and Understanding | God's Sovereignty | Spiritual Blindness: The God of this Age | Spiritual Blindness: the God of this World