Google used to give you a frame with the direct link to the image. But now image search is redirecting you to the page itself.
If you are a) using an older browser or b) opted out of the interface of a newer browser by clicking "Switch to Basic Version" at the bottom of the results page, you will be taken directly to the referrer URL. If you decide later to switch to a new browser and/or not opt out and remain in the Standard Version, you will see the framed version of the image with the ability to click out to the Visit Page/View Image.