. The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology . Fig. 19Relative Positions of Examiner and Examined in Indirect Ophthalmoscopy 30 THE FUNDUS OCULI OF BIRDS through the pupil is reflected by the struc-tures of the background into the eye of theobserver is the principle of the ophthalmos-cope. Moreover, this reflection, or ratherrefraction, of the incident rays, modified by. Fig. 20Morton Ophthalmoscope the character of the media through whichthey pass furnish the wonderfully varied andcolored pictures observed in the oc
. The fundus oculi of birds, especially as viewed by the ophthalmoscope; a study in the comparative anatomy and physiology . Fig. 19Relative Positions of Examiner and Examined in Indirect Ophthalmoscopy 30 THE FUNDUS OCULI OF BIRDS through the pupil is reflected by the struc-tures of the background into the eye of theobserver is the principle of the ophthalmos-cope. Moreover, this reflection, or ratherrefraction, of the incident rays, modified by. Fig. 20Morton Ophthalmoscope the character of the media through whichthey pass furnish the wonderfully varied andcolored pictures observed in the ocular back-grounds of all the vertebrates. This brief account of the ophthalmoscopeand its method of employment is offered forthe benefit of those who have not used theinstrument, but no description of ophthal-moscopy will much aid the zoologist in ac-quiring a practical knowledge of its applica-tion in the actual examination of animalseyes even in the favorable surrounding of thedarkened laboratory. Only a number ofmonths spent in the exploration of the eyesof such domestic animals — including Man —as are most readily accessible and easily ob-served, followed by ophthalmoscopy of wildspecies obtained in field work, will make anexpert of the student. While the writer will not say that a practical knowledge of the oph-thalmoscope is essential to the training of thescientific zoologist yet it is an instrument thatfurnishes precise and val
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjecteye, bookyear1917
