Meaning and origin of "Damn your eyes"?

I remember “damn your eyes” from the folk ballad “Sam Hall.” Mr Hall is being hanged for murder. He damns pretty much everybody, including the Parson, Sheriff, his girlfriend Nellie, and the onlookers at the party. It was a popular ballad at least in the 19th century and most likely earlier. Johnny Cash recorded it on American IV. The Cash song and the Young Frankenstein are probably responsible for keeping it fresh.

Some of the lyrics from “American Ballads: Naughty Ribald and Classic,” 1952 (I probably have some older lyrics around, but I’m not in the mood to go looking for them):

Oh, my name it is Sam Hall, it is Sam Hall;
Yes, my name it is Sam Hall, it is Sam Hall;
Yes, my name it is Sam Hall, and I hate you one and all,
Yes, I hate you one and all, God damn your eyes.

Oh the Parson he did come, he did come;
Yes, the Parson he did come, he did come;
And he looked so bloody glum, as he talked of Kingdom Come -
He can kiss my ruddy bum, God damn his eyes.

He is an angry man who is cursing all those who are now looking at him on the gallows. Some are looking at him with pity, remorse, condemnation, and sympathy. With no where else to go but down, he tells them all to go take a flying leap through a rolling doughnut in the polite way of the times. Unlike the uncouth bastards we live with today.

So in today’s parlance - “F him”