Theory:Doctor Who television discontinuity and plot holes/Oxygen


 * Why isn't the Doctor using his regeneration powers to repair his eyes?
 * Because it isn't life threatening and would be a waste of a full rejig.
 * There's never been any indication that a Time Lord can direct regeneration energy to repair a single part of their own body. We have only ever seen the Doctor do this to other people (i.e. River Song's wrist, reviving Davros), never to himself.