. Sur les anomalies de l'hébergement et à la réfraction de l'œil, avec une dissertation préliminaire sur dioptrics physiologique. osa, qui peut être considérée comme un renforcement de l'neurilemmaof les ensembles séparés, et d'une amende qui betraced peut continuer entre les fardeaux de la couche fibreuse de la rétine. Thechorioidea semble mettre fin abruptement à la marge de l'audace,car le pigment, qui est ici largement accumulés, actuallyceases chorioideal, pas plus que les autres bateaux ont continué ; mais itstissue néanmoins entoure les faisceaux du nerf optique, andthus contribue vraiment à

• Contributeur: The Reading Room / Alamy Banque D'Images
• ID de l’image: 2AGD9R5
• Taille du fichier: 7,1 MB (238,3 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 1356 x 1842 px | 23 x 31,2 cm | 9 x 12,3 inches | 150dpi

Informations supplémentaires

Cette image appartient au domaine public, ce qui signifie que le droit d’auteur a expiré ou que le titulaire du droit d’auteur a renoncé à ses droits. Les frais facturés par Alamy couvrent l’accès à la copie haute résolution de l’image.

Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.

. On the anomalies of accommodation and refraction of the eye, witha preliminary essay on physiological dioptrics. osa, which may be regarded as a strengthening of the neurilemmaof the separate bundles, and of which a fine continuation can betraced between the bundles of the fibrous layer of the retina. Thechorioidea appears to terminate abruptly at the margin of the nerve, because the pigment, which is here largely accumulated, actuallyceases, nor are the chorioideal vessels continued further; but itstissue nevertheless surrounds the fasciculi of the optic nerve, andthus really contributes to the formation of the lamina cribrosa. Sothe chorioidea, both through its connexion with the internal sheathb of the optic nerve, and by its prolongation among the nerve-tissue, is here firmly attached. Almost directly at the place, where its pig-ment commences, the elements of the deeper retinal layers begin toshow themselves, over which the nerve-layer now expands.—If withthis w»e compare the section of the entrance of the optic nerve inhighly-developed staphyloma posticum (Fig. 146) it will appear Fig 146. that the external sheath, a, escapes near the sclerotic from the nerve, that a small part, a, here tnrns inwards, but that the greatest part, a, APPEARANCE OF THE RETINA. 377 inclines outwards towards the sclerotic; that, on the contrary, the innersheafh, £, continues closely to surround the nerve; near the nerve-sur-face/ forms the lamina cribrosa, and now passes at $outwards into thesclerotic, running to meet the fasciculus, a, of the outer sheath turn-ing inwards. This thin fasciculus, a h, bounds the loose connectivetissue, c, which here, c} has acquired a great breadth, and is thereforeevidently very much extended. The sclerotic consequently here consistsalmost exclusively of a thin fasciculus, a b, derived from the twonerve-sheaths, and this is covered anteriorly by the completely atro-phic pigmentless chorioidea, d. It appears, that the nerve, whichhere exhibits su

Recherche dans la banque de photos par tags

• bookcentury1800
• bookdecade1860
• bookidonanomalieso
• bookyear1864