Anophthalmos and microphthalmos in a chick / by E. Treacher Collins and J. Herbert Parsons.

  • Collins, E. Treacher (Edward Treacher), 1862-1937.
Date:
[1903]
Catalogue details

Licence: In copyright

Credit: Anophthalmos and microphthalmos in a chick / by E. Treacher Collins and J. Herbert Parsons. Source: Wellcome Collection.

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

    7/20
    Eepnntcd f rom Vol. XXIII of the 'Ophthalmological Society's Transactions,''} Anophthalmos and microphthalmos in a chich. By E. Treacher Collins and J. Herbert Parsons. (With Plate XIII.) The chicken which forms the subject of these notes was bred from an Indian game-cock and a Dorking hen. The same fowls have been bred from for the past two years. None of their previous progeny have presented any mal- formations. The chick was hatched in an incubator ; it was quite healthy, but born blind. It could not see to find its food, but could eat and drink quite well when put to it. It was killed when four days old, and its head sent for examination. After the removal of some of the feathers, the eyelids on each side were seen to be well formed. On separation of them, a small eyeball with a clear bright spot in it representing the cornea could be seen on the left side. On the right side no eyeball could be made out. The head of the chick, after being hardened in formol, was decalcified and embedded in celloidin. A series of sections were then cut through it vertically so as to pass across both orbits. All the sections traversing the orbits were preserved, and a large number of them from different levels stained and mounted. Microscopical examination of these sections show that oil the right side no optic nerve, retina, or lens are present. Some hyaline cartilage, situated a little depth from the surface in the form of a complete ring, is seen in some of the sections (Plate XIII, figs. 1 and 3). The width of the cartilage composing this ring is about that of the liyaline cartilage in the sclerotic of the left eye, and like it has externally a small amount of fibrous tissue. Outside this fibrous tissue is striated muscle and adipose tissue.