Remarks on the amblyopia and etiology of strabismus / by George W. Berry.

  • Berry, George W.
Date:
[1887]
Catalogue details

Licence: Public Domain Mark

Credit: Remarks on the amblyopia and etiology of strabismus / by George W. Berry. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    permanent degree of strabismus. It may be formulated as follows: Permanent squinting comes from squinting, just as permanent straightvision comes from looking straight. This which at first sight may appear to flavour of femi- nine logic, merely expresses the conception that just as parallelism is the equilibrium of innervation in straight eyes so convergence is the position of innervation equi libriura of the squinter. The permanent amount of in- nervation is in both the result of habit induced by the respective requirements, and in both cases is not unalter- able though only liable to slow alteration. This view of the nature of squint, viz: - that it is not due even in its permanent form, to any abnormal state of the muscles, be that a structural or physical change, but merely to an abnormal innervation to convergence and which is really nothing but an extension, so to speak, of Donders theory 17