An image processing technique comprises the steps of: (a) stretching an original image in the Y-direction (vertical) by a factor falling within the range of 2-10%; selecting a fixation point and disordering the image centring the disordering operation around the fixation point; and rotating the image through an angle falling within the range 3-9 , preferably clockwise; (b) stretching a copy of the original image in the X-direction (horizontal) by a factor falling within the range of 2-10 %; and selecting an area of the image around the selected fixation point; and (c) merging the selected area of the image formed in step (b) with the image formed in step (a).