Document Detail

Infant random dot stereoacuity cards.
MedLine Citation:
PMID:  9580381     Owner:  NLM     Status:  MEDLINE    
PURPOSE: The overall goal was to develop a simple test of random dot stereoacuity that can be used during the first 24 months of life to measure sensory outcomes following treatment of ophthalmopediatric disorders, both in the context of clinical trials and in the context of clinical management. METHODS: A series of random dot stereoacuity test cards were constructed using vectographic vertical bar stimuli with crossed disparities ranging from 1735 to 45 sec. A two-alternative, forced-choice, preferential-looking test protocol was used to measure stereoacuity in 95 healthy term infants (173 tests) over the 1.5-to-24-month age range. Success rate, validity, and tolerance limits for normal performance as a function of age were evaluated. RESULTS: The success rate was high (158 of 173 tests; 91.3%). The maturation of random dot stereoacuity was similar to that measured in earlier lab-based preferential-looking and visual evoked potential protocols; few infants younger than 2 months of age demonstrated stereopsis although by 12 months, mean stereoacuity was 2.1 log sec (120 sec). A further improvement to 1.7 log sec (56 sec) was seen during months 18 to 24, consistent with data obtained in an earlier operant random dot protocol. Tolerance limits for normal ranged from approximately 1000 sec at 6 months to 100 sec after 12 months. CONCLUSIONS: The infant random dot stereoacuity cards provide a simple, quick, and portable preferential-looking test of random dot stereoacuity for infants that has a high success rate and excellent concordance with stereoacuity outcomes from laboratory-based protocols.
E E Birch; S Salomão
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of pediatric ophthalmology and strabismus     Volume:  35     ISSN:  0191-3913     ISO Abbreviation:  J Pediatr Ophthalmol Strabismus     Publication Date:    1998 Mar-Apr
Date Detail:
Created Date:  1998-06-19     Completed Date:  1998-06-19     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  7901143     Medline TA:  J Pediatr Ophthalmol Strabismus     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  86-90     Citation Subset:  IM    
Retina Foundation of the Southwest, Dallas, TX 75231, USA.
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MeSH Terms
Aging / physiology
Child Development
Depth Perception / physiology*
Equipment Design
Evaluation Studies as Topic
Infant, Newborn
Vision Tests* / instrumentation
Visual Acuity / physiology*
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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