Ophthalmic and otic memoranda / By D.B.St. John Roosa ... and Edward T. Ely.

  • Ely, Edward T. (Edward Talbot), 1850-1885
Date:
[1885]
Catalogue details

Licence: Public Domain Mark

Credit: Ophthalmic and otic memoranda / By D.B.St. John Roosa ... and Edward T. Ely. Source: Wellcome Collection.

Provider: This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.

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    ish prominence about -fV in. diameter, (p. 61 ). Nerve-fibres radiate from disc into retina in all directions. Central artery of retina, or arteria centralis retina [Lat. equiv.], enters nerve f-£ in. behind eyeball and runs for- ward in centre of nerve to papilla where it branches into retina. Enclosed in sheath ol its own. Nutrient capillaries of nerve from ant. cerebral, central artery, and vessels oi neurilemma ; anastomose in papilla with branches from short ciliary. Central vein accompanies artery, enclosed in separate sheath : leaves nerve a little nearer eyeball; empties into cavernous sinus, anastomosing with ophthalmic and so with facial. Lym- phatics numerous in nerve and sheaths. Space between sheaths regarded as lymph-space, with which lymphatics of nerve and post, parts of eye connect. This space connects with arachnoidal lymph-space of brain. EYEBALL, OR BULBUS OCULI. In ant. part orbit to outer side of its axis, about equi-distant from upper and lower walls. Spheroidal form with segment of smaller sphere projecting from ant. surface. Antero- posterior diameter about .95 in. Transverse, .92 in. Vertical, .90 in. Weight, 6.3-8 grammes. Volume, about £ cubic in. Ante- rior pole, geometric centre of cornea. Post, pole, geometric centre of back part of globe, or fundus (Lat. for bottotn). Optic axis,