Visual assessment of infants: vernier targets for the Catford drum.

Visual assessment of infants: vernier targets for the Catford drum. Research Abstract Details 

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Visual assessment of infants: vernier targets for the Catford drum. Abstract Text:

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.

Visual assessment of infants: vernier targets for the Catford drum. Publishing Authors By Initials

For similar visual acuity research abstracts see: visual acuity research

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Visual assessment of infants: vernier targets for the Catford drum. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The British journal of ophthalmology

VOLUME: 75

Page Numbers: 280-3

Journal Abbreviation: Br J Ophthalmol

ISSN: 0007-1161

DAY: 28

MONTH: May

YEAR: 1991

Visual assessment of infants: vernier targets for the Catford drum. Information

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LANGUAGE: eng

NlmUniqueID: 421041

Visual assessment of infants: vernier targets for the Catford drum. Keywords Mesh Terms:

KEYWORDS: Visual Acuity

MESH TERMS: methods

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Grant and Affiliation Information for Visual assessment of infants: vernier targets for the Catford drum.

AFFILIATION: Eye Department, Northampton General Hospital.

Country: ENGLAND

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MEDLINETA: Br J Ophthalmol

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