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Multiple Pacinian neurofibromas involving the three phalanges of the ring finger of the left hand in a 60-year-old woman are described. The abnormal proliferation of Vater-Pacini corpuscles in various stages of differentiation was associated with marked changes of the glomus type of arterio-venous anastomoses of the finger-tip. The close relationship between the new proliferated Vater-Pacini corpuscles, their altered baresthetic function and the pathological shunting of blood account for the painful Raynaud-like symptoms. The name 'Pacinian neurofibromatosis' is proposed.

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Tables are presented giving the MTF of an aberrationless defocused lens with circular aperture for objects illuminated with incoherent monochromatic light. MTF values are given to six decimal places for reduced spatial frequencies nu(r) = 0(0.01)1 and defocusing Delta = 0(0.1)0.4, 0.5(0.5)5, 10(5)50, except that 5/Delta is an upper limit on nu(r). Here Delta is measured in units of Rayleigh's (1/4) lambda tolerance on defocusing. The integral of the MTF and (MTF)(2) are also given for Delta