In Isaiah 42:19, is the “servant” described as spiritually blind referring to Jesus, or to Israel? How should Christians understand this passage?

[Isaiah 42:19](https://biblehub.com/isaiah/42-19.htm) says: > “Who is blind but my servant, and deaf like my messenger whom I send…?” When I read this alongside the rest of Isaiah 42:18–25, I struggle with whether this “servant” is meant to describe: 1. Israel as a spiritually blind people, 2. the prophetic servant/Messiah, or 3. both in different senses. My specific concern is this: If Christians interpret Isaiah 42 as a Messianic prophecy fulfilled in Jesus, how should we understand verse 19 describing the servant as “blind” or “deaf”? Does the text imply any lack of understanding in the servant, or is this metaphor meant in a different way? I’m looking for an explanation grounded in the text and Christian theological interpretation, especially regarding how the “blindness” metaphor can be reconciled with Christian beliefs about Jesus’ perfect obedience and knowledge of God’s law.