. Anatomy, descriptive and applied. Anatomy. THE SCLERA AND CORNEA 1089 follow the direction of the axes of the orbits and are therefore oot parallel, each nerve either leaves or connects with its eyeball about 1 mm. below and 3 mm, to the inner or nasal side of the posterior pole (Fig. 804). The eyeball measures rather more in its transverse and antero-posterior diameters than in its vertical diameter, the former amounting to about 24 mm. (nearly an inch), the latter to about mm. (nine-tenths of an inch). The diameters in the female are some- what less than in the male. At birth the eyeb
. Anatomy, descriptive and applied. Anatomy. THE SCLERA AND CORNEA 1089 follow the direction of the axes of the orbits and are therefore oot parallel, each nerve either leaves or connects with its eyeball about 1 mm. below and 3 mm, to the inner or nasal side of the posterior pole (Fig. 804). The eyeball measures rather more in its transverse and antero-posterior diameters than in its vertical diameter, the former amounting to about 24 mm. (nearly an inch), the latter to about mm. (nine-tenths of an inch). The diameters in the female are some- what less than in the male. At birth the eyeball has a transverse diameter of about 17,5 mm., while at puberty it measures from 20 to 21 mm. The eyeball is composed of three investing tunics and of three main refracting Fig. 805.— of a horizontal section of the right eye, showing the upper surface of the lower segment. (Testut.) THE TUNICS OF THE EYE. From without inward the three tunics are: I. Sclera and Cornea. II. Choroid, Ciliary Body, and Iris. III. Retina. I. The Sclera and Cornea (Tunica Fibrosa Oculi). The sclera and cornea (Figs. 805 and SOG) form the external tunic of the eyeball; they are essentially fibrous in structure, the sclera being opaque, and forming the posterior five-sixths of the globe; the cornea, which forms the remaining sixth,, is Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gray, Henry, 1825-1861; Spitzka, Edward Anthony, 1876-1922. Philadelphia, New York, Lea & Febiger
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
