
Tim Emrick |

For reference: Eye King template. (Links go to d20pfsrd.com, because this template is from Green Ronin's Advanced Bestiary, not a Paizo product.)
This template "can be added to any living creature that is not blind." Its defining trait is the Eyes or Eyestalks quality, which states: "An eye king has a roughly spherical body with a single central eye on the front of its body. It has a number of eyes or eyestalks equal to the base creature’s racial Hit Dice (minimum 1, maximum 20) that protrude from the top of its head."
You can add this template to a PC humanoid race, but the result is a bit underwhelming because of how humanoid racial HD work.
The humanoid creature type reads: "Humanoids with 1 Hit Die exchange the features of their humanoid Hit Die for the class features of a PC or NPC class. Humanoids of this sort are typically presented as 1st-level warriors, which means they have average combat ability and poor saving throws. Humanoids with more than 1 Hit Die (such as giants) are the only humanoids who make use of the features of the humanoid type."
Therefore, a dwarf eye king, which has no racial HD, gets only the minimum of one eye or eyestalk, regardless of character level.