Walsh & Hoyt's Clinical Neuro-Ophthalmology: The Essentials by Neil R. Miller Prem Subramanian Vivek Patel

Author:Neil R. Miller,Prem Subramanian,Vivek Patel [Miller, Neil R.; Subramanian, Prem S.; Patel, Vivek R.]
Language: eng
Format: epub
ISBN: 978-1-4963-1873-2
Publisher: Lippincott Williams & Wilkins
Published: 2015-02-02T20:00:00+00:00

Testing the Pupillary Near Response

The near response, a component of the near triad that also includes accommodation and convergence, should be tested in a room with light that is adequate for the patient to fixate an accommodative target. A nonaccommodative target, such as a pencil, may not be a sufficient stimulus to produce a proper near response even in a normal person. The near response should not be induced by having the patient look at a bright light stimulus, because the light itself may produce pupillary constriction. One can document the light and near response with photographs or pupillometry (Fig. 14.3).

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