On the development and abnormalities of the zonule of zinn / by E. Treacher Collins.

  • Collins, E. Treacher (Edward Treacher), 1862-1937.
Date:
[1892]
Catalogue details

Licence: Public Domain Mark

Credit: On the development and abnormalities of the zonule of zinn / by E. Treacher Collins. 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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    expected, both are present. When the deficiency is very great indeed the lens would be mobile, and might become dislocated. . . p Abnormal density or frailty of the adhesions m part ot the circnmference wonld also be Hkely causes of displace- ment of the lens, and would account for those cases m which some of the fibres of the suspensory hgament can be seen passing (in a case of displacement upwards), from the lower margin of the lens to the ciliary body. Delay in the closure of the foetal cleft, though it did not lead to a permanent coloboma of the ciliary body, could yet lead to ectopia of the lens; for the eye might have expanded to such an extent, that the lens would have been drawn away from the lower portion of the globe, before the ciHary process had sulficiently developed to have acqmred adhesions to its capsule. +>ip • Mr. Nfettleship,* in his text-book on diseases _ of the eye says Congenital dislocation of the lens is often aL^mpanied by other defects of development, such as '°^?tT noteworthy that the lens is almost invariably dis- placed upwards, either directly or with some mchnation Cards or outwards, that is to say, it is f-ost a^^^^ displaced in the opposite direction to the fcBtal cleft, which te know is generally downwards or downwards with either a slight inclination inwards or outwards. The second case, of which I give the f f of this paper, resembles in several points the fiist Both Ire cbagn'os;das cases of ghoma of the retma, and the eye^ brU accoTdingly enucleated. In both the central hyaloid Ivwl persistent and patent, and in both it ternimated :nteirin a mass of cells and fibres at the posterior » Diseases of tlic Eye, 5ili Ed., p. 181.