Hints on ophthalmic out-patient practice / by Charles Higgens.

  • Higgens, Charles, 1846-1920.
Date:
1877
Catalogue details

Licence: Public Domain Mark

Credit: Hints on ophthalmic out-patient practice / by Charles Higgens. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    and reflect the light from the lamp into the pupil of the patient's right eye. If the exami- nation be properly conducted, we shall see that the pupil, instead of appearing black, returns a bright red reflection. We next look for the optic disc, which lies somewhat to the inner side of the axis of the eyeball. We know when we are looking at the disc from the alteration in colour of the reflection through the pupil, which changes from bright red to white or pink. Having obtained the reflection peculiar to the optic disc, we approach until an interval of only two inches separates our own cornea from that of the observed eye. Having approached thus near, supposing that both our own and the observed eye are emmetropic, and that the accom- modation of both be relaxed, we shall see a distinct erect and considerably magnified image of the optic disc and retinal vessels; we should examine all parts of the interior of the globe by looking in different directions through the pupil. The examination of the erect image requires much more practice than that of the inverted, but we should all try to become proficient in it, as we can by its aid make out minute changes in the fundus of the eye much more accurately F