Report of tlie Foundling Asylum of the Sisters of Charity, in the City
of New York, from October 11, 1869, to October 1, 1871.
OPHTHALMOLOGY. 307
Braitiiwaite's Ketrospect of Practical Medicine and Surgery. Part
LXIV., January. New York: W. A. cytotec 400 mg Townsend, 1871.
On the Method of Creation of Organic Types. By Edward D. Cope,
A. M. Philadelphia: McOaUa & Stavely, 1872, pp. 35.
The Journal of the Gynajcologieal Society of Boston, vol. v. July to
December, 1871. Boston: James Campbell, 1872.
Small-pox : The Predisposing Conditions, and their Prevention. By
Dr. Carl Both. Boston : Alexander cytotec 200 mcg Moore, 1872.
Forty-Sixth Annual Report of the President of Harvard College, 1870
'71. Cambridge, 1872, pp. 87.
Transactions of the Iowa State Medical Society. Davenport : Griggs,
"Watson & Day, 1871, pp. 272.
The Influence of Speculative Beliefs in Medicine. By Z. 0. McEh*oy,
M. D., pp. 13.
Fourth Annual Report of the Xew York Orthopaedic Dispensary. New
York, 1872.
^..jJorts 0it tlje ^r00iTss of g^^bkhu.
OPHTHALMOLOGY FOR 1871.
By Henky D. Noyes, M. cytotec cheap D., I^ew York.
1. — The Support of the Byes during Expiratory Blood-pressure. By
Prof. F. C. DoxDERS. [Archiv. f. Oph., xvii., 1, 80.]
On the occasion of a recent visit to England, Prof. Donders had his at-
tention called by Darwin to a theory propounded by Sir Charles Bell that
the closure of the eyelids serves to protect the globes against injurious press-
ure (during the act of coughing or sneezing) of the sudden rush of blood,
caused by these expiratory acts. After some investigations Prof. Don-
ders was'convinced that in these acts the arterial pressure is increased, but
quickly abates. Further, during expiration, the jugular vein cytotec price becomes dis-
tended, and is emptied during inspiration ; and its distention is not due to
regurgitation of blood from the chest. On examining the vessels in the
fundus oculi, it was where to buy cytotec found that, during forctd expiration, the veins become
larger, and light pressure on the globe with the finger makes the veins
smaller. When the superficial ocular cytotec 200mcg vessels are examined with the micro-
scope, tlie artei'ies are little changed, order cytotec online while the veins increase in size during
violent expiration.
It may justly be inferred tliat the lids under these circumstances give
support to the circulation of the eye. The internnl ocular circulation
finds online cytotec its greatest support in the normally tense condition of the globe and
in the elasticity of its coats.
Other eifects of forced expiration are distention of the orbital veins, cytotec cost
and consequent protrusion of the ball. The degree of prominence of the
308 KEP0RT3 O:^ THE PKOGRES3 OF MEDICINE.
eye varies with the width to -which the lids are separated, and in eacdi act
of winking the glohe moves to a slight degree hackward or forward. In
eiForts of accommodation, the globe slightly advances.
2. — The Eye in Acephalous Monsters. By Prof. W. Manz, Freiberg
[Virchow's Archiv., Bd. li., Hft. iii., S. 313-340.]
By careful study of eight embryos born without brain, Prof. Manz
endeavors to determine the relations of the optic nerve to the brain in it3
development.
If the accepted theory, that the opticus is merely an outgrowth from
the brain, be tenable, it is greatly interesting to know what becomes of
the nerve if the brain is wanting. The result of his inquiry was, that
the structure which in these cases represents the nerve contains no nerve-
tissue, and is in fact no nerve. In the retina, only the opticus fibres and
the ganglion cells are deticient. The rest of the retina and of the eye pre-
S3nt no anomalies. \
After making this statement, an elaborate account is given of cytotec buy online the pecu-
liarities of the embryonic eye in its various structures. A few items may
be selected :
The epithelium of the membrane of Descemet passes as a continuous
layer from the cornea over the ligamentum pectinatum upon the iris.
The stroma of the choroid has no pigment. The superjacent epithelium is
Avell cytotec on line developed and tilled with pigment-granules. The i)yaline membrane
of the vitreous is distinct from the capsule of the lens and from the mem-
brana liniitans of the retina; cell-forms pervade the whole corpus; there
are no other vessels than cytotec 200 mg the central cytotec mg artery, saving in one specimen, in
which a brancli of a posterior ciliary artery came directly through the mem-
branes into the online pharmacy cytotec vitreous. The optic nerve looks normal, and has the usual buy cheap cytotec
double sheath; the intervaginal space is clothed with buying cytotec epithelium. As the
nerve passes into the sclera, it does not undergo the constriction which cytotec order be-
longs to the developed state, but continues of the same diameter as when
outside the bulb. The nerve-sheaths pass into the sclera, and the nerve
adheres intimately with the choroid, and purchase cytotec nothing but tlie vessels mark
the place of its connection with the retina. There is no border to denote
the outline of the optic disk. The vessels spread out equally in all di-
rections, not as when fully grown, the larger vessels going upward and
downward. The arching toward the macula buy cytotec does not exist, and no macu-
la lutea appears. All the layers of the retina except optic fibres and gan-
glion cells could be identified.
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