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1947•British Journal of OphthalmologyOpen access

MYOPIA AND PSEUDO-MYOPIA

J. P. S. Walker

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Abstract

qualitati've differences of vision, and it has been customary to refer- these to " higher centres."But, as Granit says, " whatever the sensation under consideration, whether flicker, colour, or brightness, the higher centres are no magicians capable of taking rabbits out of' an empty hat."The complex fundamentals have been proved to have their origin in the retina.Difterences oi frequency and pattern provide qualitative differences in the optic nerve impulses: and it may be that, since there is a difference between the action potentials. of fibres of difterent diameter (Gasser and.Erlanger, 1924), the modulator paths may be made up of fibres of fixed size.J.H.P.

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qualitati've differences of vision, and it has been customary to refer- these to " higher centres."But, as Granit says, " whatever the sensation under consideration, whether flicker, colour, or brightness, the higher centres are no magicians capable of taking rabbits out of' an empty hat."The complex fundamentals have been proved to have their origin in the retina.Difterences oi frequency and pattern provide qualitative differences in the optic nerve impulses: and it may be that, since there is a difference between the action potentials. of fibres of difterent diameter (Gasser and.Erlanger, 1924), the modulator paths may be made up of fibres of fixed size.J.H.P.

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Available abstract

qualitati've differences of vision, and it has been customary to refer- these to " higher centres."But, as Granit says, " whatever the sensation under consideration, whether flicker, colour, or brightness, the higher centres are no magicians capable of taking rabbits out of' an empty hat."The complex fundamentals have been proved to have their origin in the retina.Difterences oi frequency and pattern provide qualitative differences in the optic nerve impulses: and it may be that, since there is a difference between the action potentials. of fibres of difterent diameter (Gasser and.Erlanger, 1924), the modulator paths may be made up of fibres of fixed size.J.H.P.

Key concepts: Medicine, Optometry, Ophthalmology

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