Two cadavers with ocular discolouration.
Ocular discolouration - also known as ‘tache noir’ or 'black spot’ - occurs when the mucous layer that normally shields the surface of the eye dries out and wrinkles after death. Dust settles over the exposed surface of the iris and scalera, causing it to turn a dark brown or black shade.
People who die with their eyes fully or partially open can appear to be bleeding from their eyes, especially if decomposition is advanced. But the discolouration is in fact only dust and dirt.