I rejoin unlucky : i think accuracy just down evasion, it will be the best explication to the amount showed when u select "accuracy"
and if more lvl u get more % amount down, u need more accuracy to hit, more eva to dodge and this variable ratio it's maybe true in pvp :
if per exemple 10eva = 0,9% for lvl 10, 10 accuracy is 0,8% for lvl 10
one player 100 eva (9%eva), 100 accuracy (8%acc)
one another player 110 eva (9,9%eva), 110 accuracy (8,8%acc)
second player final dodge % = eva of second player % - accuracy of the first player = 9.9%-8% = 1,9%
then first player final hit % = 98,1%
first player final dodge % = 9%- 8,8% = 0.2%
then second player final hit % = 99,8%
An other exemple (true this time, for lvl 50)
my char got 438,75 eva (25.89%), 434,40 accuracy (21,69%)
for the exemple i take one char with my eva x2(877,50 / 51,78%), and 50% of my accuracy (217,20 / 10,845%)
My final dodge% = my dodge% - opponent acc % = 25,89% - 10,845% = 15,045%
then my opponent hit % = 100% - 15, 045% = ~85%
My opponent dodge% = his dodge% - my accuracy % = 51,78% - 21,69% = 30%
then my final hit% = 100%- 30% = 70%
But if i'm lvl 50, and he got lvl 60 and lvl 60 give him 877,50 eva => 40% eva instead of 51,78% for lvl 50 (for exemple) and 217,20 acc => 6% acc instead of 10,845% for lvl 50 (for exemple again)
i will hit more, and dodge more if he stay with same stat when lvl up 60 (anormal), or same things if he get stats for hold his %EVA/ACC (anormal too) then i think i will get the % of eva/acc gift for his lvl 60 in a pvp situation("damage reduction" like system), then i will miss more, and dodge less cuz he got more stats after lvl up cuz he can hold this eva/acc% rates but me not, i will be considered like lvl 60 and get less hit/eva% rates per point
it explain why when u kill lower mobs u miss less and hit often too
I think it's the eden eternal secret.