Perception influences your ability to evade attacks, bonus to ranged damage, and chance to land a critical hit.
As of at latest Elona plus 2.02 perception seems to add 0.1 ranged damage modifier per 8 perception and 0.1 ranged damage per 30 perception. Evade seems to increase 1% per 6 perception.
Fishing trains Perception, as does eating fish, especially if they are high-ranking fish (fruits also raise Perception), more so if Cooking is used. Another method is to have the sense quality skill and then go to any of the random dungeons (preferably Puppy Cave) and loot a crap-ton of unidentified equipment. Your sense quality will level as you identify the equipment and give you some much needed exp for your perception stat.
When you get the message "you feel more in touch with the world", that means your perception has gone up.
When you get the message "you are getting out of touch with the world", that means your perception has gone down.
As of the latest Elona+ patch, Perception is no longer associated with Eye of Mind, instead being associated with Will.
Skills that train Perception
skillperceptionwill increase Perception by 1 level and train its potential.
|Strength||Tactics · Two Hand · Weight Lifting · Long Sword · Axe · Martial Arts · Scythe|
|Constitution||Healing · Mining · Shield · Heavy Armor · Medium Armor · Carpentry · Blunt · Polearm · Stave|
|Dexterity||Lock Picking · Dual Wield · Light Armor · Evasion · Tailoring · Pickpocket · Jeweler · Disarm Trap · Short Sword · Bow · Crossbow · Throwing|
|Perception||Stealth · Sense Quality · Detection · Fishing · Eye of Mind · Greater Evasion · Marksman · Firearm · Analysis (Elona+)|
|Learning||Literacy · Memorization · Alchemy · Anatomy · Gardening · Cooking · Gene Engineer|
|Will||Magic Capacity · Faith · Traveling · Riding · Eye of Mind (Elona+)|
|Magic||Meditation · Casting · Magic Device · Control Magic|
|Charisma||Negotiation · Investing · Performer|
|Speed||Swimming · Traveling (Elona+)|