Anorexia can cause potentially serious eye damage, according to a small study published online in the British Journal of Ophthalmology.
It found the retinal nerve fibre layer was significantly thinner in the eyes of women with anorexia nervosa than women without.
The Greek research on 13 anorexics and 20 non-anorexics also found significantly less electrical activity - a key element of processing visual images, in the eyes of the women with anorexia nervosa.
They said: “A significant anatomical and functional impairment has been proven for the first time.”
It is not yet clear whether these signs will revert back to normal if normal eating patterns are resumed.