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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    concomitant, is the practical equality in the degree of deviation of the squint, Tor all directions of fixation necessitating the same amount of accommodation. Still another is the equality existing between the primary and secondary angles of the squint, that is to say,the degree of the squint when either eye is used for fixation, in all cases where the refraction is the same in the two eyes. These circumstances when considered either singly or combined will be found inconsistent with either the assumption of a weakness of the externus or a spasm of the internus, both of which must necessarily give rise to conditions more allied to what is met with,in paralytic than in ordinary strabismus. Another explanation which has long been offered and which differs but slightly from Schweigger's, is that the permanent squint is merely the expression for the posit lm 11