Red-eye

Red-eye was a disease found amongst enslaved Ood on their homeworld of the Ood Sphere. Its symptoms were bright red eyes, rabid temperment and anti-Human sentiment.

It was most commonly caused by having no communications to the third brain. This caused the brain inside the Oods head and the brain in the Oods hands to fight or argue. This happened when humans modified the Ood with the translation orb because they also inslaved the third brain in a anti-telepathy circle, hence the saying "The circle must be broken". This happened in an episode DW: Planet of the Ood. It was thought that Red-eye was caused by the beast possessing them "The Satan Pit".

It may also have been caused by the subconscious of the Ood Brain reemerging amongst the Ood after 200 years of slavery and the sabotage of Ood Operations's systems by the Friends of the Ood. However, similar symptoms occured in the Ood serving the Walker Expedition on Krop Tor. It would later lead to the Battle of the Ood Sphere in 4126 and the freedom of the Ood. (DW: Planet of the Ood)