20/20 is a passive item.
Effect[]
- Isaac fires two tears at once, one from each eye.
0.8× damage multiplier.
Notes[]
- Unlike other multiple shot items like Mutant Spider or The Inner Eye, 20/20 does not reduce the rate of fire.
- The maximum amount of tears per volley that can be reached by combining and/or duplicating 20/20, The Inner Eye, Mutant Spider, and The Wiz is 16, or 20 with the Keeper.
Synergies[]
- Blood Clot / Chemical Peel: Every second row of tears has increased damage.
- Brimstone: Two Brimstone shots are fired, without an increase in charge time.
- Diplopia:
- Every additional 20/20 adds 2 more tears in a tight pattern.
- Adds one more tear without further lowering damage.
- Doctor's Remote / Epic Fetus: Replaces the single missile strike with a barrage of two consecutive missiles.
- The Inner Eye / Mutant Spider:
- Adds two/three tears to each shot, with no extra fire rate decrease.
- Removes the fire rate penalty while reducing damage to 80%. Additional copies will add one additional tear with no further change to damage/fire rate.
- Keeper:
- Fires 5 tears with no fire rate decrease.
- Decreases tears' spread. Reduces damage dealt to 80%, but makes his base tear stat equal 2.73. This is a damage per second increase if tear rate before picking up was less than 3.75; otherwise this is a damage per second decrease. This is the same for Tainted Keeper.
- The Ludovico Technique: The Ludovico tear gains one smaller tear orbiting the main one, each dealing the same amount of damage.
- Monstro's Lung: Adds two tears to the tear barrage, for a total of 16.
- Polyphemus: Grants additional +5 flat damage and removes the fire rate penalty, firing 2 tears per shot.
- Sprinkler: Fires two tears at once that almost completely overlap each other.
- Technology: Fires two technology shots simultaneously.
- Tractor Beam: Both tears are fired along the beam. Only one tear can be seen, as they overlap each other.
- The Wiz: Two tears are fired in each direction.
Interactions[]
- Brimstone: Overrides 20/20.
- The Inner Eye: Overrides 20/20.
- Kidney Stone: Increase number of tears in tear barrage; however, only fires one stone.
- Loki's Horns: Only occasionally fires one tear in the other three directions.
- Mom's Eye: Only occasionally fires one tear out of the back of Isaac's head.
- Mom's Knife: Overrides 20/20.
- Monstro's Lung: Overrides 20/20.
- Mutant Spider: Overrides 20/20.
- Sad Bombs: Does not affect the number of tears when bombs explode.
- Technology: Overrides 20/20.
- Varicose Veins: No effect on number of tears when taking damage.
In-game Footage[]
Trivia[]
- 20/20 is an idiom that refers to someone with near-perfect vision.
- Despite only having one eye, Cain shoots two tears at once with this item.
- This item is used in Seeing Double (challenge #40).
 The Binding of Isaac: Rebirth
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