Compound Eyes increases the accuracy of moves used by the Pokémon with this Ability by multiplying the original accuracy by a factor of 1.3. This means that Thunder, for example, has 91% accuracy as opposed to the usual 70% (70 × 1.3 = 91%). Starting in Generation V, this multiplier is approximated as 5325/4096. It does not affect one-hit knockout moves.
Affected moves
The table below lists the moves affected by Compound Eyes, as well as the Pokémon that can have Compound Eyes and learn those moves.
Although the following moves are affected by the Ability, they currently cannot be learned by any Pokémon with Compound Eyes. They may, however, be called via Metronome, Mirror Move, Copycat, or Mimic, or be used by a Pokémon that gained Compound Eyes with an Ability like Trace or Receiver or a move such as Skill Swap or Role Play.