Can someone rewrite this in their own words please. Open Depth of field is controlled by changing the aperture setting on your camera. Like your eye, a camera lens has an iris inside that can open or close to let in more or less light.
A shallow depth of field is the small or narrow area in an image that is in focus. Often, the background is blurred while only the subject stays in focus.

Shallow Depth and Open depths have vast differences. Unlike Open depth, Shallow depth of field is when there is only a small amount of area in an image that is focused. With Open depth of field you are able to change the setting on your camera allowing you to see better. An example of this, is how your eye has an iris that lets in the amount of light that is necessary. A camera has the same effect, it has its own iris.