Just like your eyes express a lot revealing your thoughts, eye vectors do nothing different. The best way to put your thoughts direct to the audience is using eye vectors. For instance, if you are promoting a campaign that supports people affected in a calamity, the best you can use is an eye vector with tears rolling. You can also see Bird Vectors.
This will look more convincing to viewers.Eye vectors are mostly beneficial to opticians as icons for various purposes like showing illustrations of various eye diseases, different colors of lens, or for an optical shop advertisement on flyers, banners and visiting cards.