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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    imaginary straight line from pole to pole. Visual line, imaginary straight line drawn through nodal point from macula lutea to ob- ject ; it usually cuts the cornea a little above the optic axis, and at an angle of $-jJ to the inner side of it. Nodal point, centre of cur- vature of the refracting surfaces. It lies a little in front of the posterior surface of the lens. Equatorial plane, imaginary plane through centre, perpendicular to axis, divid- ing globe into ant. and post, hemispheres. Equator, line where eq. plane cuts surface. Meridional planes, imaginary planes coin- ciding with axis. Meridians, lines where meridian planes cut surface. Eyeball composed of 3 tunics : (a) sclerotic and cornea, (b) uveal tract, or tunica vas- culosa,*comprising choroid, ciliary body and iris, (c) retinaj and 3 humors : (a) aqueous, (b) crystalline, (c) vitreous. SCLEROTIC, OR SCLERA. [Gr. o-KArjpo?, hard.] Opaque, post, f outer tunic, of which ant. i is formed by cornea. Seen between lids an- teriorly as white of the eye. Forms firm capsule for globe, helping to maintain proper shape and protect parts within. Gives attach- ment to ocular muscles. Thickest posteriorly (aV in.) where it is joined by optic sheaths; at
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