Dead Eye

Dead Eye is a passive item added in Afterbirth.

Effects

 * Isaac's damage increases for each successive tear hit on enemies.
 * The multiplier increases by 0.125x for each hit, going up to a maximum of 2x after 8 successive hits.
 * If a tear misses and hits nothing (wall/floor), there is a chance for the multiplier to be reset back to 1.
 * As the multiplier increases, Isaac's tears glow red and increase in size.

Interactions

 * Brimstone: No effect.
 * Epic Fetus: No effect.
 * Host Hat: Tears fired by the Host are affected by Dead Eye.
 * Incubus: Incubus's tears do not affect the multiplier, but Incubus can gain damage from Isaac's normal tears increasing the multiplier.
 * Lilith: Because she cannot normally fire tears, Dead Eye has no effect.
 * Isaac's Tears: If the tears fired by Isaac's Tears miss, they cause the multiplier to reset.
 * Marked: Multiplier is gained even faster.
 * Mom's Knife: No effect.
 * Monstro's Lung: Isaac will shoot an inaccurate burst of tears, meaning many tears will miss and the damage boost will be reset frequently.
 * Piercing Tears: Not recommended, as tears that travel through enemies may still count as misses.
 * Rubber Cement: Tears that hit enemies may bounce off and still count as misses.
 * Soy Milk: Due to the extreme increased in rate of fire, building up the damage multiplier is faster but misses are much more frequent.
 * Tech X: Tech X overrides the effects of Dead Eye and damage stays at the 2x multiplier.
 * Technology: Damage is always set to 2x.
 * Technology 2: No effect from the laser itself, but the tears fired from the second eye are affected by Dead Eye.

Synergies

 * 20/20: If both tears hit, they both contribute to the damage multiplier.
 * Chocolate Milk: Charging tears makes it easier to avoid missing.
 * Chocolate Milk + Technology 2: Successfully hitting enemies with the Chocolate Milk shots will increase the damage of the Technology 2 laser.
 * Petrification/Slow items: Enemies will be petrified or slowed, making them easier to hit without missing.
 * Polyphemus: Isaac's tears become much larger, making it easier to avoid missing.
 * The Ludovico Technique: Damage bonus increases until it hits the max of 2x. Since the controllable tear never hits the ground or wall, the bonus cannot be lost.
 * Lilith + The Ludovico Technique: Lilith is able to control a tear and is able to gain the damage up from Dead Eye.

Trivia

 * The item is a reference to the Bullseye.

Seeds
YVFS JR94 (treasure room adjacent to spawn) (both modes) LJBR NZLM (treasure room adjacent to spawn) CH4M DY4E (first floor treasure room)