. The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology . Fig. Bird of Paradise (Parotia lawii). Fig. Raven (Corvus corax). Diagrams of the Pecten as seen by the Ophthalmoscope in Various Species of Birds. 48 THE FUNDUS OCULI OF BIRDS pictured by different observers, an accuratephotographic reproduction is much to bedesired. Probably the inventor who has come near-est this ideal is Wolff (Monatsbl. f. Augen-heilk., p. 447, Oct., Nov., 1907) of Berlin,who has done much in the photography of thehuman fundus. He
. The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology . Fig. Bird of Paradise (Parotia lawii). Fig. Raven (Corvus corax). Diagrams of the Pecten as seen by the Ophthalmoscope in Various Species of Birds. 48 THE FUNDUS OCULI OF BIRDS pictured by different observers, an accuratephotographic reproduction is much to bedesired. Probably the inventor who has come near-est this ideal is Wolff (Monatsbl. f. Augen-heilk., p. 447, Oct., Nov., 1907) of Berlin,who has done much in the photography of thehuman fundus. He made use of the lightfurnished by the Zeiss projection apparatus,the efferent rays being reflected into the eye,through half the pupil, by a specially con-trived mirror. The efferent rays passed outthrough the other half of the pupil and werefocussed in a photographic camera. A circleof the fundus about 10 mm. is thus illuminatedat one time and the resulting picture — ofcourse in gray tones — is magnified from threeto four diameters. The required exposure isless than one-thirtieth of a second. The printsshowed the
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjecteye, bookyear1917
