This strange metal mask has thin sheets of cut gemstone fitted into each eye hole.  The left eye is fitted with a strange red gem, while the right is fitted with a blue-green one.

Passive Abilities:
Sharp Vision - While wearing this mask, you have advantage on Wisdom (Perception) checks that rely on sight. In conditions of clear visibility, you can make out details of even extremely distant creatures and objects as small as 2 feet across.
Clear Vision - The gemstone lenses of the mask help to filter out visual noise, and normalize light levels.  You cannot be blinded by bright light sources while wearing the mask, you can see twice as far in poor-visibility conditions such as fog or sandstorms, you can see normally while under water, you gain Advantage to all saves against the effects of Gaze abilities, and you gain Darkvision 60'.
See Creature Age - You can see numbers representing the HP total and biological age floating above any living creature you look directly at.  Biological age cannot be read on someone who has traveled through time, as their lifeline in the Demiplane of Time has been segmented as a result of their non-linear history.
See Object Age - You can see a number representing the "years : days : minutes" any inanimate object you look directly at has existed since it was assembled/created, floating above it.
Navigational HUD - A translucent heads up display is magically projected onto your vision, and automatically points in the direction of the target creature or object this mask is currently locked on to.  The default target when no lock is active is always a simple nickel ring that was created in tandem with this mask.  (DM's discretion whether the ring is found with the mask, or if a side-quest or mini adventure is required to follow the HUD signal and recover the ring once this mask is found.)
Targeting HUD - An additional layer of the translucent heads up display is magically projected onto your vision whenever you are in combat, and highlights the target locked on to by the mask whenever they are in line of sight.  This visual highlight grants you +1 to hit rolls against that target, and +1 to the save DC for spells you cast against it.  This also allows you to see invisible or hidden foes, so long as you were able to lock on to that target before they became hidden or invisible.

Charge Abilities (6 max charges):
Reset Target Lock (0 charges) - Reset the mask's current target lock, refocusing it to the simple nickel ring.
Acquire Target (1 charge) - As a free action, you may look at any object or creature directly and set the mask's current target lock to that.  You do not need to reset a previous target lock before using this ability.
Scan Target's Intent (2 charge) - As a free action, you may have the mask scan the most probable immediate future of the locked on target.  This information is displayed in your HUD for the next 1 rounds.  You may choose either to gain Advantage on your next attack against that target this turn, or impose Disadvantage upon any attacks the target makes against you until the beginning of your next turn.

Notes: Advantage: Perception, Advantage: Saving Throws, Sense: Darkvision, Detection, Utility, Eyewear