Display Settings:

Format

Send to:

Choose Destination
J Pediatr Ophthalmol Strabismus. 1996 Sep-Oct;33(5):251-6.

The range and variability of ophthalmological parameters in normal children aged 4 1/2 to 5 1/2 years.

Author information

  • 1Dalhousie University, Halifax, Nova Scotia, Canada.

Abstract

BACKGROUND:

Some standards for childhood ophthalmological variables exist. However, for most parameters, the range of variation found in normal children remains poorly defined.

METHODS:

We have determined the range of normal function for a number of commonly measured ophthalmological variables in 162 children, classified normal by Gold Standard ophthalmological examination. This group is representative of almost 12,000 normal children aged 4 1/2 to 5 1/2 in Nova Scotia.

RESULTS:

In 56.8% of eyes the visual acuity was 6/4.5. The use of a chart with crowding bars was more discriminating between differences in higher levels of acuity and highlighted differences in acuity between the two eyes. Randot stereoacuity showed a uniform, non-Gaussian distribution of scores. Cycloplegic refractive errors were distributed about a modal value of between +0.5 and +1.0 diopter. Forty percent of eyes had no detectable astigmatism. Ninety-seven percent of subjects had no heterophoria. Fusional vergence data are presented.

CONCLUSION:

Our results document the complete normal range for selected ophthalmological parameters in normal preschoolers. The values obtained were in general better than expected.

Comment in

  • Stereopsis revisited. [J Pediatr Ophthalmol Strabismus. 1997]
PMID:
8880619
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Loading ...
    Write to the Help Desk