Document Detail


Visual assessment of infants: vernier targets for the Catford drum.
MedLine Citation:
PMID:  2036345     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Targets comprising a horizontal black line 5' thick offset by 1' were printed on strips to stick to the drums of the Catford Visual Acuity Apparatus. The 'vernier' targets so produced corresponded to the different sizes of Snellen letters from 6/6 to 2/60 when presented at 50 cm. Twenty-five children between the ages of 3 and 12 years with known amblyopia (mostly strabismic) were tested in a double blind trial to compare the visibility of the vernier targets with subjective Snellen acuity. All vernier results, both for better and amblyopic eye, were within one line of Snellen acuity. One hundred and twenty normal preverbal infants with normal eyes under the age of 2 1/2 years were tested with the vernier strips. Normal infants under the age of 6 months recorded a vision of 6/60-2/60; normal infants aged 6 to 12 months recorded 6/24-6/36, and infants between the ages of 1 and 2 1/2 years recorded 6/12-6/18.
Authors:
B Hopkisson; P Arnold; B Billingham; M McGarrigle; P Entwistle
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Controlled Clinical Trial; Journal Article    
Journal Detail:
Title:  The British journal of ophthalmology     Volume:  75     ISSN:  0007-1161     ISO Abbreviation:  Br J Ophthalmol     Publication Date:  1991 May 
Date Detail:
Created Date:  1991-07-01     Completed Date:  1991-07-01     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  0421041     Medline TA:  Br J Ophthalmol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  280-3     Citation Subset:  IM    
Affiliation:
Eye Department, Northampton General Hospital.
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MeSH Terms
Descriptor/Qualifier:
Age Factors
Amblyopia / physiopathology*
Child
Child, Preschool
Double-Blind Method
Humans
Infant
Vision Tests / methods*
Visual Acuity
Comments/Corrections

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