The left hand and the right hand are 'mirror images' (of each other). = The left hand is the/a 'mirror image' of the right hand.
He's the 'mirror image' [=(more commonly) 'spitting image'] of his father. [=he looks just like his father]
She is worried about what motherhood will do to her 'image' [='reputation'] as a rock star.
(..) AIright, Mrs. Peenman! That's correct. We aII wear masks, metaphoricaIIy speaking. We suppress the id, our darkest desires... and adopt a more sociaIIy acceptabIe image. The book is ''The Masks We Wear'' by Dr. Arthur Neuman. Thank you for being here. What's the matter with you? What is it? (..)1994 The Mask