Gravitational effects, such as Mega Fatty's inhalation or a Gaping Maw will pull floating tears toward them.
The range attribute only affects the lifespan of the tears after they have been released.
Hovering tears can damage monsters like Knights or Mask of Infamy from the front, even if they don't have the piercing effect.
Synergies
C Section: Fetuses stand in place while the fire button is held. They will still home on enemies in this state. Fetuses attacking this way deal more damage.
The Forgotten: Each swing of his club creates an additional hitbox in front of him that lasts for about a second before proceeding forward and disappearing. The club throw is unaffected.
Lachryphagy: Tears will float in midair, making them easier to feed. Burst tears will also float in midair before moving.
Proptosis: The tears will not decrease in size or damage until they start moving, making this excellent against enemies that chase Isaac.
Tainted Magdalene: Hug swipes float, allowing for extra hits as the swipes remain mid-air.
Tech.5: Creates floating laser balls that will all fire simultaneously when the fire button is released.
Technology Zero: All of the tears fired are connected by electricity, creating a series of electric fences.
Tiny Planet: Tears stay in place until released, they will start to orbit around Isaac when released.
Tears orbit close to Isaac when held, then snap to the edge of the orbit when released.
Interactions
Azazel / Brimstone: A red mist expands and then contracts, doing contact damage to any enemy that touches it. It then fires the original Brimstone shot before disappearing. It allows a new shot to be charged up immediately after firing without interrupting the first shot. It does not increase the range of Azazel's Brimstone beam.
Brimstone + Conjoined: Fires a single laser instead of a triple laser.
Brimstone + Soy Milk: Brimstone continues firing from the position it was fired.
Bob's Rotten Head: Continues to hover in the air while the fire button is pressed after launching it.
Diplopia: No effect; -2 tears delay does not stack.
Euthanasia: If a needle tear destroys an enemy and the fire button is held, the burst needles will hover until the button is released.
Kidney Stone: When the Kidney Stone effect is activated, the tear barrage will hover until released. The stone will not hover and will travel regardless.
: (Not recommended) The anti-gravity effect stays in place for the whole duration of the tear barrage even if the fire button isn't held resulting in a complete loss of control of fire for as long as the barrage is active.
A Lump of Coal: Despite the visual increase in size, damage still only increases based on the distance traveled.
Tears no longer increase in size while hovering.
Multidimensional Baby: Multidimensional Baby will travel the same path as the Anti-Gravity tears, easily doubling any stationary shots. Any moving tears that hit it will produce a normal moving copy, however stationary tears will spawn a copy that will eventually fall to the ground even after the direction is released.
Stationary duplicated tears will release normally.
My Reflection: Combines both effects. Tears no longer hover in place; instead, they will weakly home in on Isaac like he is a pivot point, following as he moves. Releasing the attack buttons will launch the tears from their position as usual.
Notched Axe: Melee attacks will generate a hovering tear in the shape of the swing of the pickaxe.
Spirit Sword: Sword beams are affected normally by Anti-Gravity. Regular sword swipes are unaffected, but spin attacks freeze for a short time before firing.
-2 tear delay (increased rate of fire)
+1.0 fire rate.
Mega Fatty's inhalation or a 
Gaping Maw will pull floating tears toward them.
Knights or 
Mask of Infamy from the front, even if they don't have the piercing effect.
C Section: Fetuses stand in place while the fire button is held. They will still home on enemies in this state. Fetuses attacking this way deal more damage.
The Forgotten: Each swing of his club creates an additional hitbox in front of him that lasts for about a second before proceeding forward and disappearing. The club throw is unaffected.
Lachryphagy: Tears will float in midair, making them easier to feed. Burst tears will also float in midair before moving.
Proptosis: The tears will not decrease in size or damage until they start moving, making this excellent against enemies that chase Isaac.
Tainted Magdalene: Hug swipes float, allowing for extra hits as the swipes remain mid-air.
Tech.5: Creates floating laser balls that will all fire simultaneously when the fire button is released.
Technology Zero: All of the tears fired are connected by electricity, creating a series of electric fences.
Tiny Planet: Tears stay in place until released, they will start to orbit around Isaac when released.
Azazel / 
Brimstone: A red mist expands and then contracts, doing contact damage to any enemy that touches it. It then fires the original Brimstone shot before disappearing. It allows a new shot to be charged up immediately after firing without interrupting the first shot. It does not increase the range of Azazel's Brimstone beam.
Bob's Rotten Head: Continues to hover in the air while the fire button is pressed after launching it.
Chocolate Milk: Overrides Anti-Gravity.
Soy Milk: Tears are released immediately, despite not charging.
Compound Fracture / 
Cricket's Body / 
Haemolacria / 
The Parasite: Burst tears will not hover even if a fire button is held.
Cursed Eye / 
Dr. Fetus / 
Epic Fetus / 
Eye of the Occult / 
The Ludovico Technique / 
Marked / 
Mom's Knife / 
Monstro's Lung / 
Tech X: Only tear delay down applies.
Diplopia: No effect; -2 tears delay does not stack.
Euthanasia: If a needle tear destroys an enemy and the fire button is held, the burst needles will hover until the button is released.
Kidney Stone: When the Kidney Stone effect is activated, the tear barrage will hover until released. The stone will not hover and will travel regardless.
A Lump of Coal: Despite the visual increase in size, damage still only increases based on the distance traveled.
Multidimensional Baby: Multidimensional Baby will travel the same path as the Anti-Gravity tears, easily doubling any stationary shots. Any moving tears that hit it will produce a normal moving copy, however stationary tears will spawn a copy that will eventually fall to the ground even after the direction is released.
My Reflection: Combines both effects. Tears no longer hover in place; instead, they will weakly home in on Isaac like he is a pivot point, following as he moves. Releasing the attack buttons will launch the tears from their position as usual.
Notched Axe: Melee attacks will generate a hovering tear in the shape of the swing of the pickaxe.
Spirit Sword: Sword beams are affected normally by Anti-Gravity. Regular sword swipes are unaffected, but spin attacks freeze for a short time before firing.
Technology: Only tear delay down applies.
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