left or right eye?

[Sarangeti]

new player here. I've found a few items so far that give a bonus to the right or left eye. How do I determine whether they work or which eye the respective character shoots with?

[lieutenantkirtar]

Those items are just every other shot gets the bonus. You can't choose to only use the stronger eye.

[The Renderer]

The characters per default shoot from both eyes alternately. There are exceptions like Cain who wears a patch and can only shoot from the right eye. And of course there are items that can make characters only shoot from one eye after taking them.

[Kobeth]

Most characters shoots alternatively from their left eye and their right eye, some exceptions include both version of azazel, who each start with their own versions of Brimstone, both versions of Lilith, who are blind and only shoots through their familiars, both versions of Cain have an eye patch on their left eye and therefore only shoots through their right eye, Both versions of Keeper start with their own tear effect with the first one being similar to the effect of the Inner Eye, shooting 3 tears at a time, and the other one being similar to Mutant Spider, shooting 4 tears at a time, The Forgotten in skeleton form doesn't shoot tears and of course tainted Forgotten also doesn't shoot tears.

For the exception characters that I mentioned, as a general rule, when you have an item that affect only one eye, they have a chance to proc this effect on each of their attacks. For exemple, if Cain would pick up Blood Clot that only affect the left eye, Cain has a 50% chance to proc the effect of Blood Clot, even though he doesn't shoot with his left eye. Azazel and The Forgotten also have a chance to proc such effect on their Brimstone shot or their Melee attack respectively even though they technically don't constitute tears. Both versions of the Keeper will proc such effects on every other of their shots. You can generally observe this in game as items affecting tears from one specific eye also change the appearance of those tears. Blood Clot for exemple shoots slightly bigger blood colored tears.

[Sarangeti]

Thanks for the detailed answers. I read through the comments and observed it in the game, now things are clearer.