This verse is a small part of the story of Jeroboam, the first king of the northern kingdom of Israel after the kingdom split following Solomon's death. It provides context for what's about to happen next. Let's break it down:

"Jeroboam’s wife did so, and arose, and went to Shiloh, and came to Ahijah’s house.": This tells us that Jeroboam's wife carried out the plan that Jeroboam instructed her to do. She travelled to Shiloh, a place of religious significance (it was once where the Ark of the Covenant was kept), and went to the home of the prophet Ahijah. Jeroboam has sent her in disguise to ask the prophet Ahijah about the fate of their sick son.

"Now Ahijah could not see; for his eyes were set by reason of his age.": This explains that the prophet Ahijah was old and blind. The phrase "eyes were set" likely means that his eyesight had deteriorated significantly or failed completely due to old age. This is important because it sets the stage for Jeroboam's wife's attempted deception. She hopes to fool the blind prophet by disguising herself. It also highlights God's power, as Ahijah, despite his blindness, will still be able to see through the deception because God will reveal the truth to him.

In essence, the verse means that Jeroboam's wife followed his instructions and went to see the prophet Ahijah in Shiloh. The prophet was very old and blind, which Jeroboam's wife likely hoped to exploit in her attempt to deceive him. This sets the scene for a crucial encounter and a prophecy that will have significant consequences for Jeroboam and his kingdom.