"Moses was one hundred and twenty years old when he died.
His eyes were not dim nor his natural strength diminished."
Moses followed the vision that God had shown him.
He had seen to the other side of the curtain.
I believe that his eyes reflected the condition of his soul, his thinking with God.
He didn't have any beams with ta lot of dust that comes with them, in his eyes.
Without a vision people perish, they just vanish away without any eternal investment.
Maybe their steps were "right" and well calculated, but they never walked on the water.
Their steps never sounded like an army of thousands of warriors.
II Kings 7:6
They never danced on the ruins of fallen Jericho.
Their eyes were filled with things, but there was no fire from heaven in them.
Their eyes were beautiful, but empty.
"By faith Moses forsook Egypt, not fearing the wrath of the king:
for he endured AS SEEING HIM WHO IS INVISIBLE." Hebrews 11:27