Albert Barnes Commentary Isaiah 35:5

"Then the eyes of the blind shall be opened, and the ears of the deaf shall be unstopped." — Isaiah 35:5 (ASV)

Then the eyes of the blind shall be opened - The images in this verse and the following are those of joy and exultation. They describe the times of happiness when God would come to save them from their enemies. This passage is so accurate a description of what the Messiah, the Lord Jesus, did, that it undoubtedly refers to the miracles which he would perform. On several occasions he did in fact restore the blind to sight, thus giving the most unequivocal proof that he was the Messiah sent from God (Matthew 9:27; Matthew 20:30; Mark 8:23; Mark 10:46; Luke 7:21).

It is a full confirmation of the opinion that this passage refers to Christ that the Savior himself appeals to the fact that he restored sight to the blind as a demonstration that he was the Messiah, implying that it was predicted that this would be a part of his appropriate work (Matthew 11:5).

And the ears of the deaf be unstopped - This is another demonstration of divine power and another proof that would be provided that the Messiah was from God. The Lord Jesus often gave this demonstration that he was invested with divine power (Matthew 11:5; Mark 7:32, 7:37; Mark 9:25).