Brudenall D K, Schwab I R, Lloyd W, Giorgi P P, Graydon M L
Animal Eye Services, Macgregor, Brisbane, Qld, Australia.
Anat Histol Embryol. 2007 Oct;36(5):382-8. doi: 10.1111/j.1439-0264.2007.00779.x.
Investigations were undertaken to evaluate the unique choroidal vascular system of the Megachiroptera (fruit bats) and its possible significance for retinal nutrition. Fluorescein angiography was performed and documented on Pteropus poliocephalus. Vascular casts were made of the eye of Pteropus scapulatus. Histologic evaluation was performed on P. scapulatus. Results confirmed that each papilla has a vascular core, and a unique vascular system emanating from the optic disc. The histological appearance of the choroid and retina of P. scapulatus confirmed a vascular core to the papillae with a thin, but definite Bruch's membrane. Megachiroptera have a unique vascular system to supply nutrition to the retina consisting of capillary loops within a dense, uniform mosaic of choroidal projections or papillae, which permit the diffusion of metabolites to the retina and a heretofore undescribed vascular tuft emanating from the optic disc. We suggest that this vascular system provides nutrition by diffusion to a thick avascular retina, without any shadowing by vessels, and allows for nocturnal visual acuity and light-gathering capabilities.
开展了多项研究以评估大蝙蝠亚目（果蝠）独特的脉络膜血管系统及其对视网膜营养的潜在意义。对灰头狐蝠进行了荧光素血管造影并记录。制作了肩章狐蝠眼睛的血管铸型。对肩章狐蝠进行了组织学评估。结果证实，每个乳头都有一个血管核心，以及一个从视盘发出的独特血管系统。肩章狐蝠脉络膜和视网膜的组织学外观证实乳头有一个血管核心，伴有一层薄但明确的布鲁赫膜。大蝙蝠亚目有一个独特的血管系统为视网膜提供营养，该系统由脉络膜突起或乳头密集、均匀镶嵌内的毛细血管环组成，这使得代谢产物能够扩散到视网膜，还有一个迄今未描述的从视盘发出的血管丛。我们认为，这个血管系统通过扩散为厚的无血管视网膜提供营养，不会有血管造成的任何阴影，并有助于夜间视力和聚光能力。
