Red eyes appear in photos when the camera flash or another bright light source is reflected from the retina. The reflected light illuminates the rich blood supply of the connective tissue at the back of the eye and produces the red color you see in pictures.
To remove red-eye on dotphoto, go to the dotphoto editor by choosing a photo and then tapping the pencil icon. Then choose the red-eye feature, select the eyes and apply.
Getting more out of dotPhoto 