When it is said
Anyone may pray these words as thanks when sight returns, after an illness or an eye operation.
They are short enough to say the moment you can see again.
Where it comes from
Author known
How Tobit went blind
One night Tobit came home from burying the dead and slept by the wall of his courtyard with his face uncovered. Sparrows in the wall dropped warm dung into his open eyes, and white films grew over them. The physicians he went to could not help him (Tobit 2:9-10).
How his sight came back
God heard Tobit’s prayer and sent the angel Raphael to heal him (Tobit 3:16-17). When Tobit’s son Tobias came home with Raphael beside him, the angel told him to put the gall of a fish on his father’s eyes. Tobias did, and the white films peeled away from the corners of Tobit’s eyes. When Tobit saw his son, he threw his arms around him (Tobit 11:7-13).
The Book of Tobit
Tobit is in the Bible of the Orthodox and Catholic Churches. Protestants follow the Hebrew Bible, which does not include it, so it is not in their canon.
What the words mean
“You disciplined me”
Tobit names his blindness and his healing in one breath, as God’s discipline and God’s mercy. The book shows the mercy plainly. Raphael later tells Tobit that he brought Tobit’s prayers before the Holy One, and that God sent him to heal Tobit (Tobit 12:12-14).
In Greek
εὐλογητὸς εἶ ὁ Θεὸς, καὶ εὐλογητὸν τὸ ὄνομά σου εἰς τοὺς αἰῶνας, καὶ εὐλογημένοι πάντες οἱ ἅγιοί σου ἄγγελοι,
ὅτι ἐμαστίγωσας καὶ ἠλέησάς με· ἰδοὺ βλέπω Τωβίαν τὸν υἱόν μου·
From Tobit 11:14-15 in the Greek Old Testament (the Septuagint), the text Brenton printed, on eBible.org.