Document Detail

Visual field and grating acuity development in low-risk preterm infants during the first 2 1/2 years after term.
MedLine Citation:
PMID:  1388794     Owner:  NLM     Status:  MEDLINE    
The effect of early visual experience on visual field size and grating acuity development was studied longitudinally in 36 appropriate for gestational age (AGA) and 26 small for gestational age (SGA) low-risk preterm infants. These were selected out of 194 very low birth weight (VLBW) infants (birthweight less than 1500 g) born in 1985 and 1986. Criteria for inclusion as low-risk were the absence of neurological, respiratory, circulatory and alimentary problems in the neonatal period; no retinopathy of prematurity and no evidence of abnormality on the neonatal cranial ultrasound scans. Binocular field sizes were assessed using kinetic arc perimetry. Binocular grating acuity was tested by means of the prototype version of the acuity card procedure. Results were compared with norms obtained in control fullterms in earlier studies. Infants were tested at 6 weeks, 6, 6, 9 and 12 months of age from the expected term date. Twenty-two of these infants were retested at 2 1/2 years of corrected age. Visual field size and visual acuity estimates of (both AGA and SGA) low-risk, VLBW preterms and control fullterms overlapped at all test ages, except for a slight but significantly faster development of the upper and the lower visual field at 6 weeks corrected age in the preterm group. These results indicate that for clinical purposes visual experience before the expected term date has not only no measurable effect on the normal development of behavioural acuity, but also no accelerating effect on the development of peripheral vision.
J van Hof-van Duin; D J Heersema; F Groenendaal; W Baerts; W P Fetter
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Behavioural brain research     Volume:  49     ISSN:  0166-4328     ISO Abbreviation:  Behav. Brain Res.     Publication Date:  1992 Jul 
Date Detail:
Created Date:  1992-11-12     Completed Date:  1992-11-12     Revised Date:  2006-03-01    
Medline Journal Info:
Nlm Unique ID:  8004872     Medline TA:  Behav Brain Res     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  115-22     Citation Subset:  IM    
Department of Physiology I, Sophia Children's Hospital, Erasmus University, Rotterdam, Netherlands.
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MeSH Terms
Child, Preschool
Infant, Low Birth Weight
Infant, Newborn
Infant, Premature / physiology*
Infant, Small for Gestational Age
Vision, Binocular
Visual Acuity / physiology*
Visual Fields / physiology*

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