An atlas of ophthalmoscopy : with an introduction to the use of the ophthalmoscope / by O. Haab ; translated and edited by Ernest Clarke.

  • Clarke Ernest, 1857-1932.
Date:
1895
Catalogue details

Licence: Public Domain Mark

Credit: An atlas of ophthalmoscopy : with an introduction to the use of the ophthalmoscope / by O. Haab ; translated and edited by Ernest Clarke. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

    35/256
    THE SIZE OF THE OPHTHALMOSCOPIC IMAGE. Another very important reason for holding the ophthalmoscope as near as possible to the eyes is that a view of the fundus is obtained thus much more easily through a small pupil, and without altering the position of the eyes a much largei surface of the fundus can be observed. [If the pupillary opening is very small, we must try and enlarge it by darkening the other eye ; and it this does not do it, we must instil a drop of homatropine (2 per cent, solution with 4 per cent. sol. of cocaine in ol. ricini) ; or, what is better, smear the inside of the lower lid with vaseline and homatropine (2 per cent.). In about twenty to thirty minutes the pupil will have enlarged sufficiently to enable us to make a careful examination of the fundus.] It is not advisable to use atropine in such cases, as the effect takes much longer to pass off, and in old people may be the cause of glaucoma. An experi- enced oculist very rarely has to resort to artificial dilatation of the pupil if the eye is normal, unless he wishes to thoroughly examine the macula region, and in such a case it is almost indispensable, especially in old people, whose pupils are notably smaller than those of younger people. For the same reason the opening in the ophthal-
    digitised image 1
    digitised image 2
    digitised image 3