Judge’s Gaze is the second Challenge Tomb in the Peruvian Jungle.
Completing all 9 Challenge Tombs in Shadow of the Tomb Raider unlocks the “Tomb Raider” Achievement/Trophy. To complete these challenges you need to reach the end of the challenge tomb and interact with the stele statue.
The challenge tombs can all be completed after the story and are not missable. Each of the tombs unlocks a new ability for Lara.