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Master mode icon.png
Master Mode-Only Content: This information applies only to Master Mode and Master Mode worlds.
Pair of Eyeballs
  • Pair of Eyeballs item sprite
Stack digit 1.png
Use time20 (Very fast)
TooltipSummons miniature mechanical eyes
'Two are better than one.'
RarityRarity level: Fiery red
Research1 required
Grants Buff
BuffRez and SpazRez and SpazDesktop and Mobile versions
Buff tooltipYou have special eyes!
Summons Pet
  • Rez and Spaz
    Rez and Spaz
Dropped by Dropped by
Master mode icon.png Master
The TwinsThe TwinsThe Twins125%

The Pair of Eyeballs is a pet-summoning item dropped by The Twins in Master Mode with a 1/4 (25%) chance. It summons Rez and Spaz, miniature versions of the The Twins in their first form.


  • Unlike the Suspicious Grinning Eye, the Pair of Eyeballs do not change phases.
  • The item tooltip is a reference to the phrase "Two heads are better than one."
  • The buff tooltip may be a reference to the 1-800-Contacts commercials.
  • This is the only pet summoning item that spawns two pets instead of one.
  • Despite the pet being called "Rez and Spaz", the names of the bosses are Retinazer and Spazmatism.