. The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology . is the number and visibility of these capillaries that give the redtone to an eye-ground essentially gray. The optic disc is a long, narrow oval, quite white, with a quan-tity of fine gray lines radiating in all directions from the papillarymargin. On the inner aspect of the eyeground the macula is is situated about one disc-length from the upper extremity of thepecten and half a disc-length above the end of the same organon the inner side. The macula re
. The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology . is the number and visibility of these capillaries that give the redtone to an eye-ground essentially gray. The optic disc is a long, narrow oval, quite white, with a quan-tity of fine gray lines radiating in all directions from the papillarymargin. On the inner aspect of the eyeground the macula is is situated about one disc-length from the upper extremity of thepecten and half a disc-length above the end of the same organon the inner side. The macula resembles a blue-green flake of iri-descent glass. It is of oval shape with a reddish-brown center,which, however, is unprovided with a reflex ring. The pecten appears to be in folds; the lower, or broader portionextends well forward towards the lens and turns towards the nasalside of the birds head. The inner quadrants of the fundus are moreeasily seen with the ophthalmoscope than the outer half but, so far asthe latter area is visible, there is no sign of a second macula on theouter part of the eyeground. 134 CARINATiE. Alciformes Plate X\ F rat ere ul a arctica
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjecteye, bookyear1917
