The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology (1917) (14569170427)

Identifier: fundusoculiofbir00wood (find matches)

Title: The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology

Year: 1917 (1910s)

Authors: Wood, Casey A. (Casey Albert), 1856-1942

Subjects: Eye Birds -- Anatomy Ophtalmoscope and ophtalmoscopy

Publisher: Chicago, The Lakeside Press

Contributing Library: MBLWHOI Library

Digitizing Sponsor: MBLWHOI Library

Text Appearing Before Image:

ve ophthalmoscopy of reptilianfundi. With the aid of Mr. Heads brush andby courtesy of Dr. Lindsay Johnson the writeris able to compare a few typical fundi ofReptiles with those of their ancestral cousinsthe Birds. It requires only a glance at these picturesto feel assured that the eyes of that nocturnalreptile the Turkish Gecko (Plate LIX),whatever else may be said on the subject,are more decidedly avian or, rather, moreornithosaurian than are those of the HornedToad (Plate LX), or Indian Cobra (PlateLXI), whose fundi belong more distinctly toother vertebrate types. These last-namedpossess definite retinal vessels (that issuefrom a circular optic papilla), and they haveno pecten or at least the mere suggestion ofone. Compare Plate LXI with Fig. 143;and Plate LX with Fig. 144, which showthe resemblance between the Cobra fundusand that of the Hedge-Hog, while the eye-ground of the Horned Toad suggests thatof the Virginian Opossum. For further com-parison a diagram of an ichthyan fundus

Text Appearing After Image:

Fig. 14 Ophthalmoscopic View of the Fundus of the Fish Gadus merlangus.(After Beauregarde.) The processus falciformis (black) runs the wholelength of the (white) optic nerve-head, at the peripherj of which are seensix branches of the hyaloid artery. oculi (Fig. 14)—that of Gadus merlangus —is shown. If one may draw any conclusion from suchsparse material and from such an incidentalexamination of the subject it is that whateverof common origin the avian and reptilianclasses may have originally had the ornitho-logical branch left the parent stem with asubdivision of the Lacertilia and not with theOphidia. Chapter V OPHTHALMOSCOPY, OR THE EXAMINATION THROUGH THE PUPILS OF ANIMATE SPECIMENS OF THE INTERIOR OF THE VERTEBRATE EYE BY MEANS OF THE OPHTHALMOSCOPE Since this subject, although familiar toophthalmologists (oculists), is rarely under-stood by naturalists in general, and espe-cially not by ornithologists, a brief review ofophthalmoscopy as practiced on the verte-brate eye may n

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1917

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