Flann O'Brien, The Third Policeman pages 24-25

His face was terrifying but his eyes in the middle of it had a quality of chill and horror which made his other features look to me almost friendly. The skin was like faded parchment with an arrangement of puckers and wrinkles which created between them an expression of fathomless inscrutability. But the eyes were horrible. Looking at them I got the feeling that they were not genuine eyes at all but mechanical dummies animated by electricity or the like, with a tiny pinhole in the centre of the 'pupil' through which the real eye gazed out secretively and with great coldness. Such a conception, possibly with no foundation at all in fact, disturbed me agonizingly and gave rise in my mind to interminable speculations as to the colour and quality of the real eye and as to whether, indeed, it was real at all or merely another dummy with its pinhole on the same plane as the first one so that the real eye, possibly behind thousands of these absurd disguises, gazed out through a barrel of serried peep-holes.