Fovea is the central part of macula. This region can be imagined to be a very high mega pixel camera capturing a lot of detail. This is what makes reading possible in us. By doing something like this it is able to process information much faster than any computer vision system presently available.

When a camera captures an image it does not consist of a single object. More over the different objects in the scene are not at a constant distance. Then where does it try to focus? To solve this, the concept of fovea inherent in the retina of our eye is brought into the camera. The fovea sees only a small part of the entire scene and thus with a high probability guarantees to see a single object. Even if this is not possible in some cases, correlation is going to take care of the rest.

What if the two eyes are looking at two different objects?, you can't rule out this! Will their focus be different? At least in our case it does not happen this way. The eyes can't have two different focus so one eye view will be blur. I will talk about such a perception in the suppression section.

 

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