. The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology . Fig. 134. Common Hoopoe (Upupa epops) Fig. 135. Anna Hummingbird (Calypte annas) Appearances of the Fundus Oculi in the Preserved Eyes of Birds. 98 THE FUNDUS OCULI OF BIRDS the bird evidently possesses binocular visionas he always looks straight ahead at objectsthat he wishes to see distinctly. Plate XL,page 159, furnishes an ophthalmoscopic viewof the right eye, erect image. The eye-ground is orange-red stippled all over withlighter orange dots. T
. The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology . Fig. 134. Common Hoopoe (Upupa epops) Fig. 135. Anna Hummingbird (Calypte annas) Appearances of the Fundus Oculi in the Preserved Eyes of Birds. 98 THE FUNDUS OCULI OF BIRDS the bird evidently possesses binocular visionas he always looks straight ahead at objectsthat he wishes to see distinctly. Plate XL,page 159, furnishes an ophthalmoscopic viewof the right eye, erect image. The eye-ground is orange-red stippled all over withlighter orange dots. The lower half of thefundus has a large number of minute, dark,reddish-gray depots of pigment intermingledwith lighter dots; also, a great many cho-roidal blood vessels run in a vertical directionover the field of view on either side of theoptic entrance. They become more numeroustowards its lower periphery. The macula is placed, as in Owls generally,on the temporal side of the optic papilla,about one disc-length from its upper endand half that distance to the temporal orouter aspect of the fundus. It is a bright,orange-red area surrounded by dark, red-gray pigme
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjecteye, bookyear1917
