. Pathology and bacteriology [electronic resource]. Ophthalmology; Eye; Eye; Bacteriology; Ophthalmology; Eye; Bacteriology; Eye. 672 DEGENERATIONS rise to a "pipe-stem" appearance. These changes are usually associated with arterial disease elsewhere, and 50 per cent, of the patients so affected, sooner or later develope cerebral lesions. Choroidal Vascular Sclerosis.—Both the choroidal arter- ies and veins may be sclerosed (Fig. 293), but as a rule the. Fig, 293.—Shows a section through the coats of the eye with sclerosed choroidal and retinal vessels cut transversely. main arteries
. Pathology and bacteriology [electronic resource]. Ophthalmology; Eye; Eye; Bacteriology; Ophthalmology; Eye; Bacteriology; Eye. 672 DEGENERATIONS rise to a "pipe-stem" appearance. These changes are usually associated with arterial disease elsewhere, and 50 per cent, of the patients so affected, sooner or later develope cerebral lesions. Choroidal Vascular Sclerosis.—Both the choroidal arter- ies and veins may be sclerosed (Fig. 293), but as a rule the. Fig, 293.—Shows a section through the coats of the eye with sclerosed choroidal and retinal vessels cut transversely. main arteries are chiefly affected, and changes are produced over areas of the choroid supplied by them. The chorio- capillaris becomes atrophied, and the larger vessels are seen with the ophthalmoscope as white worm-like bodies in the fundus, occasionally with thin columns of blood within them. The atrophy of the chorio-capillaris has a marked effect on the outer layers of the retina, the pigment cells proliferating and migrating (see page 471). Other secondary degenera- tive processes follow such as the formation of colloid nodu- les on the membrane of Bruch (see page 644). In extreme cases the nutrition of the overlying retina is cut off and it loses its function in that locality. (c) Degenerations in the Ocular Muscles.—As age advances the interstitial connective tissue of the uveal. 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 Collins, E. Treacher (Edward Treacher), 1862-1937; Mayou, M. Stephen (Marmaduke Stephen), 1876-1934; Pyle, Walter L. (Walter Lytle), 1871-1921, editor; University College, London. Library Services. London : William Heinemann
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