Facebook makes U-turn after banning RNIB's 'degrading' sight-loss ad

Social network unblocks video promoting the need for sight-loss advisers in UK hospitals after claiming it breached guidelines on language

Facebook has performed a dramatic U-turn, lifting a ban on a campaign by the Royal National Institute of Blind People that it claimed was "degrading".

The hard-hitting ad, which aims to promote the need for sight-loss advisers in every UK hospital, asks viewers to think about how they would feel if their health was under threat.