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Convergence in the human newborn |
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| Authors: | L W Wickelgren |
| Affiliation: | 1. Department of Cardiology, Medical University of Vienna, Vienna, Austria;2. Department of Clinical Pharmacology, Clinics of Cardiology and Angiology II, Universitaets‐Herzzentrum Freiburg Bad Krozingen, Bad Krozingen, Germany;3. Department of Clinical Pharmacology & Toxicology, University Hospital Basel, Basel, Switzerland;4. Center for Platelet Research Studies, Division of Hematology/Oncology, Boston Children''s Hospital, Dana‐Farber Cancer Institute, Harvard Medical School, Boston, MA, USA |
| Abstract: | The tendency of the eyes of human newborns to converge was studied in three stimulus situations. Photographs were taken of 28 Ss' eyes when they were presented with two sets of paired stimuli and with a single centrally placed stimulus. To a large extent Ss' eyes did not converge upon the same stimulus. There was a significantly greater tendency to converge when Ss looked at a stripes vs. gray stimulus pair than when they looked at paired color-brightness stimuli or a single center stimulus. The within-subject standard deviation in the distance between pupil centers was significantly greater for the stripes vs. gray stimulus pair than for the color-brightness stimuli or for the center stimulus. The results suggest that unaided human judgments of newborn ocular orientation may not reliably indicate stimulus discrimination and preference in newborn infants. |
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