Charles Ellicott Commentary 1 Kings 14:4

"And Jeroboam`s wife did so, and arose, and went to Shiloh, and came to the house of Ahijah. Now Ahijah could not see; for his eyes were set by reason of his age." — 1 Kings 14:4 (ASV)

Were set. —The same word is rendered were dim in 1 Samuel 4:15. The metaphor is evidently drawn from the solid opaque look of the iris, when affected by cataract or some similar disease.