الكافي- ط الاسلامية, volume 7, page 323

Muhammad Bin Yahya, from Ahmad Bin Muhammad, from one of his companions, from Aban Bin Usman, from Al Hassan Bin Kaseer, from his father who said, ‘An eye of a man was hit, and it was firm (in its place). So Amir Al-Momineen asws ordered for his healthy eye to be tied up (blindfolded), and got a man to stand in front of him with an egg in his hand. He asws said to him: ‘Can you see it?’ So when he said, ‘Yes, he asws made him to stand away a little more, (repeating the process) until it was hidden from him (could not see it anymore), he asws noted that place. He asws said: ‘And he asws tied up (blindfolded) the struck eye and made the man to be remote, and he was looking with his healthy eye, until it was hidden to him (could not see it anymore). Then he asws compared what was between the two, so he asws gave him the compensation upon that’.

Translation: HubeAli·Thaqalayn link·The Arabic above is the original.

Ali Bin Ibrahim, from his father, from Ibn Abu Umeyr, from Muhammad Bin Al Waleed, from Muhammad Bin Furaat, from Al Asbagh Bin Nabata who said, ‘Amir Al-Momineen asws was asked about a man who struck a man upon his head. So the struck one claimed that he could not visualise anything, nor smell the aromas, and that his tongue had gone. So Amir Al-Momineen asws said: ‘If he is speaking the truth, there would be three wergilds for him’. So it was said, ‘O Amir Al-Momineen asws ! And how does one know that he is truthful?’ So he asws said: ‘As for what he claimed that he could not smell the aromas, the tinder (firewood) would be brought near him. So if it was as he is saying, or else he would turn his head away and his eyes would water. And as for what he is claiming regarding his eyes, so he would be made to turn to face the sun with his eyes. So if he was lying, he would not be able to control himself from closing his eyes, and if he was truthful, they would both remain open. And as for what he claims regarding his tongue, so he would be pricked by a needle upon his tongue, so if the red blood comes out, so he has lied, and if the black blood comes out, so he has spoken truthfully’.

Translation: HubeAli·Thaqalayn link·The Arabic above is the original.

Muhammad Bin Yahya, from Ahmad Bin Muhammad, from Al Husayn Bin Saeed, from Hammad Bin Isa, from Muawiya Bin Ammar who said, ‘I asked Abu Abdullah asws about the man who was hit in his eye, so part of his vision was gone. Which thing would he be given?’ He asws said: ‘One of it (eyes) would be covered and an egg would be placed for him, then it would be said to him, ‘Look!’ So for as long as he claims that he can see its place, (it would be moved away) until it ends up at a place that he is helpless (from seeing it), so he says, ‘I cannot see it’. It would be brought nearer until he can visualise it, then a note would be made of that place. Then it would be compared with that from behind him, and from his right, and from his left. So it comes to be the same, or else it would be said to him, ‘You are lying’, until he speaks the truth’. I said, ‘Can he not be trusted?’ He asws said: ‘No, and there is no honour, and he would be dealt with the other eye similar to that. Then the wergild of the eye would be based upon that’.

Translation: HubeAli·Thaqalayn link·The Arabic above is the original.