Doctor Trag'tok was a male individual who lived in the 24th century and resided on board Deep Space 9. He was part of a species that had an uneven number of eyes (which included a middle one) and an opaque cranium.
In 2374, Jadzia Dax suggested to Kira Nerys that she bring Trag'tok with her for a dinner together with Dax and Worf, but Kira refused as she was bothered by Trag'tok's middle eye. (DS9 episode: "Resurrection")
- While it was mentioned that Trag'tok was a doctor, it was not specified if he was a medical doctor or was in some other type of profession.