What does Leviticus 24:19 mean?

And if a man cause a blemish in his neighbor; as he hath done, so shall it be done to him:

And if a man cause a blemish in his neighbour; as he hath done, so shall it be done to him;

And if a man cause a blemish in his neighbor; as he hath done, so shall it be done to him:

And if a man does damage to his neighbour, as he has done, so let it be done to him;

`And when a man putteth a blemish in his fellow, as he hath done so it is done to him;

He that giveth a blemish to any of his neighbours: as he hath done, so shall it be done to him:

And if a man cause a blemish in his neighbour, as he hath done, so shall it be done to him;