Paul speaks of their minds as if they had eyes, and their inability to understand as their minds being unable to see. Alternate translation: "the god of this world has prevented unbelievers from understanding" (See: [[rc://en/ta/man/translate/figs-metaphor]])
As the Israelites could not see God's glory that shined on Moses' face because he covered it with a veil (See: [2 Corinthians 3:13](../03/13.md)), unbelievers are not able to see Christ's glory that shines in the gospel. This means that they are unable to understand "the gospel of the glory of Christ" (See: [[rc://en/ta/man/translate/figs-metaphor]])