If you are suffering from severe ketu dasha then you must wear ketu blessed cat's eye or lehsuniya stone to nullify the ill-effects being created by the severe ketu dasha. Before proceeding any further, let;s disclose what does ketu dasha means and why it is considered so dangerous?Since, ketu is acknowledged being the 'shadow planet; by shadow planet we mean a planet which does not have any physical existence, yet, due to its competency to make vital changes in the lives of its wearer it is considered being an important planet.