. The fundus oculi of birds, especially as viewed by the ophthalmoscope [microform] : a study in comparative anatomy and physiology. Ophthalmoscopy; Eye; Ophtalmoscopie; Oiseaux; Oeil; Birds. 80 THE FUNDUS OCULI OF BIRD? â¢â lit tlic pi^'iuontcd rircimiferonfe of tho ciniiliir nuifiiln. Til.' mnriihr rajion, twice us as llii- ' , prt-sonts a larj;.-, trnlral fovea. The prrlen has much tho same shajw as in Squatiirola; it is, however, a little larger, aiuj has :!â » eciivohilions. The niediimi size.] coils, loiijjer Uallerj as one ai)|)roaehes tho free
. The fundus oculi of birds, especially as viewed by the ophthalmoscope [microform] : a study in comparative anatomy and physiology. Ophthalmoscopy; Eye; Ophtalmoscopie; Oiseaux; Oeil; Birds. 80 THE FUNDUS OCULI OF BIRD? â¢â lit tlic pi^'iuontcd rircimiferonfe of tho ciniiliir nuifiiln. Til.' mnriihr rajion, twice us as llii- ' , prt-sonts a larj;.-, trnlral fovea. The prrlen has much tho same shajw as in Squatiirola; it is, however, a little larger, aiuj has :!â » eciivohilions. The niediimi size.] coils, loiijjer Uallerj as one ai)|)roaehes tho free margin, ar<- cai)i)e(i hy a deep, irn'KnIar. [.arlially serrated. iidg<'-iike crest that posteriorly in a sh^rp point; anteriorly the erest heeomcs much narrower, anil ends in a tapering Irian^'ie. The optic nilnnirr is (at its middle) seen through th<- inlerrnpted coils of the peeten; and tiie infuhipapillary angle, niach- its major axis and the lower margin of the retinal hand is hetween ;)" and .^O". The shape of this eyehall is oval, 10x11. Stoxi; ri.()\|.:i(. (Edicnmux sculopux. Tlio fundus appearances (left eye, erect im- age) of this nocturnal hird are depicted in Plate XVII, ,,age 1:J7. The cyeground is a warm brown or choco- late color, rather (hrply pigmented near the periphery and cov<'red with orange-red dots that are very densely packed on tho ui)per half of the fundus. Uelow the optic entrance are numerous choroidal vessels running paral- lel with and on either side of the papilla. The iiKuiiht is to distinguish and is not clearly vmI, lue ophthalmoscope. It IS situated ahove the sui)erior end of tlio disc on its inner or nasnl side, and about half the apparent length of the peeten from the upper end. The fundus coloring is slightly in the macular area, which is surrounded by » rellex ring, [)ale gray in color, in the form' of very minute lines radiating from its margins.
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Photo credit: © The Book Worm / Alamy / Afripics
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbirds, booksubjecteye
