20/20

20/20 is a passive item.

Effect

 * Isaac fires two tears at once, one from each eye.

Synergies

 * Brimstone - Two brimstone shots are fired, without an increase in charge time.
 * Epic Fetus - Makes two missiles drop one after the other.
 * Mom's Knife - Two knives are now thrown instead of one.
 * Mutant Spider - 6 shots are fired with the normal decrease in fire rate.
 * Technology - Two technology shots are fired simultaneously.
 * The Inner Eye - 5 shots are fired with the normal decrease in fire rate.
 * The Wiz - Two tears are fired each direction.
 * Tractor Beam- Both tears are fired along the beam although due to a bug the second tear in each pair is invisible.
 * Dr. Fetus - Two bombs are thrown at once.
 * Ipecac - Two projectiles are fired at once in rapid succession.
 * Polyphemus - 2 big shots are fired.
 * The Ludovico Technique - The Ludovico tear gains one smaller tear orbiting the main one.
 * The Parasite - The two tears split into four smaller tears.
 * Rubber Cement - Both tears bounce in different directions.

Interactions

 * Blood Clot - Every second row of tears has increased damage.
 * Chemical Peel - Every second row of tears has increased damage.
 * Loki's Horns - Extra tears fired do not gain 20/20.
 * Monstro's Lung - Overrides 20/20.
 * Epiphora - Causes the accuracy of the tears to lower (More noticeable with more than one).
 * Technology - Overrides 20/20.
 * Brimstone - Overrides 20/20.
 * Mom's Knife - Overrides 20/20.
 * Mutant Spider - Overrides 20/20.
 * The Inner Eye - Overrides 20/20.

Trivia

 * 20/20 is an idiom that refers to someone with near perfect vision.
 * Curiously, Isaac can throw tears even though his eyes are covered by lenses.
 * Despite only having one eye, Cain shoots two tears at once with this item.
 * 20/20's icon is white-tinted in Afterbirth.

Seeds
77H1 T20K (Treasure room adjacent to spawn) STDX QSC8 (Treasure room adjacent to spawn) NYJK 3QDN (Treasure room adjacent to spawn) Y6FY DZH6 (Treasure room next to spawn) GD7V 66ZX (Treasure room adjacent to spawn) 92SM AXWG (Treasure room next to spawn) H3Y3 X22S (First floor treasure room)

20/20