Story highlights Iran's judicial system blinded a man in his left eye on Tuesday, Amnesty International reported

He had been convicted of putting acid on another man's face, causing him to be blinded

(CNN) Iran's judicial system believes in the ancient concept of "an eye for an eye" -- literally.

On Tuesday, a man convicted of blinding another man in an acid attack was himself forcibly blinded in one eye, according to Amnesty International and Tasnim News, a semi-official news website.

The punishment is believed to be Iran's first case of Qasas, meaning retribution in kind, Tasnim News said.

Amnesty International denounced the sentence.

"This punishment exposes the utter brutality of Iran's justice system and underlines the Iranian authorities' shocking disregard for basic humanity," said Raha Bahreini, Amnesty International's Iran researcher. "Meting out cruel and inhuman retribution punishments is not justice. Blinding, like stoning, amputation and flogging, is a form of corporal punishment prohibited by international law. Such punishments should not be carried out under any circumstances."

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