The eye as an aid in general diagnosis : a hand-book for the use of students and general practitioners / by E. H. Linnell.

  • Linnell, E. H.
Date:
1897
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Licence: Public Domain Mark

Credit: The eye as an aid in general diagnosis : a hand-book for the use of students and general practitioners / by E. H. Linnell. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    origin, while UhthofE estimates the proportion due to this cause at one-fourth the whole number. In cholera, loss of the light reflex is a bad prog- nostic omen. In the Deutsch. Med. Wochy for Jan- uary 23, 1891, Corte states that where the reaction to light fails, a fatal termination is certain, even in an ap- parently mild case, and, on the other hand, the progno- sis is favorable even in very severe cases if the light reflex is preserved, and this he considers true without regard to the existence of a dilated or contracted pupil. THE ARGYLI. ROBERTSON PUPIL. Usually the reflex contraction of the iris attending efforts of accommodation and convergence is lost simul- taneously with failure of the light reflex. It is possible for the associated contraction to be preserved when there is no response to the stimulus of light, and this variety of reflex iridoplegia is known as the Argyll Robertson pupil, and is a very valuable diagnostic in- dication in two forms of nervous disease. The method of testing the accommodative and convergent reaction has already been mentioned on page 59, and need not be repeated here. Noyes maintains that convergence and not accommodation is the factor inducing contraction in the Robertson pupil, and sup- ports his statement by eliminating all accommodation. This he did by placing a strong concave lens before the patient's eye during the examination, and found the re-