A child kept one hand over their eye for so long they have permanently lost the sight in it, a report into their care has found.
Psychologists believe the child in north Wales did so in response to their "chaotic" and "violent" life at home and that the child "did not want to see the world through that eye".
The child, who cannot be identified for legal reasons, was taken into the care of a local authority and is now attending school, but health experts still do not know what the long term effects of the abuse will be.
The details have been highlighted in a report by the North Wales Safeguarding Children's Board.