Despite its description, Cat's Eye adds 60 percentage points to a weapon's critical chance after other bonuses.
Cat's Eye stacks additively with other percentage point bonuses, such as Arcane Avenger. For example, an Atterax with a max rank True Steel, Blood Rush at a 3.0x combo multiplier, Cat's Eye, and Arcane Avenger will have a 25% × (1 + 120% + 3.0×60%) + 60% + 30% = 190% critical chance.
Highly effective with weapons with high critical damage multipliers.
Emplaced turrets (i.e. the Grineer Rampart) gain the ability to critically strike while under the effect of Cat's Eye.
While this also applies to weapons that cannot critically strike, these weapons often have a critical multiplier of 1.0x which yields no change in damage dealt.
Multiple instances of Cat's Eye do not stack.
The ability triggers when an enemy is within at least 25 meters.
Upon application of Cat's Eye, benefitting players will award 100% of the Affinity gained from kills to the Adarza Kavat responsible for applying Cat's Eye. Unusually, this also applies to Warframe abilities that do not benefit from critical chance (such as Saryn's Miasma), which can lead to significant experience gain for that Kavat.