For Jacob's eyes were dim through age and infirmity, as is observed Genesis 48:10, and therefore he could not distinctly discern them.
Related Commentaries of Genesis 48:8
Genesis 48:8
8 And Israel beheld Joseph's sons, and said, Who are these?
For Jacob's eyes were dim through age and infirmity, as is observed Genesis 48:10, and therefore he could not distinctly discern them.
8 And Israel beheld Joseph's sons, and said, Who are these?