December 2002
Volume 2, Issue 10
Free
OSA Fall Vision Meeting Abstract  |   December 2002
Amblyopia in astigmatic preschool children
Author Affiliations
  • Velma Dobson
    Department of Ophthalmology, University of Arizona, Tucson, AZ, USA
  • Joseph M. Miller
    Department of Ophthalmology and The Optical Sciences Center, University of Arizona, Tucson, AZ, USA
  • Erin M. Harvey
    Department of Ophthalmology, University of Arizona, Tucson, AZ, USA
  • Kathleen Mohan
    Department of Ophthalmology, University of Arizona, Tucson, AZ, USA
Journal of Vision December 2002, Vol.2, 48. doi:10.1167/2.10.48
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      Velma Dobson, Joseph M. Miller, Erin M. Harvey, Kathleen Mohan; Amblyopia in astigmatic preschool children. Journal of Vision 2002;2(10):48. doi: 10.1167/2.10.48.

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Abstract

Best-corrected recognition acuity (Lea Symbols chart) and best-corrected acuity for vertical and horizontal gratings was measured in 155 astigmatic and 338 non-astigmatic (<1.50 D cylinder) 3- to 5-year-old children. Reduced best-corrected recognition acuity was shown by children with simple/compound myopic or mixed astigmatism and by children with simple/compound hyperopic astigmatism. Magnitude of the recognition acuity deficit was correlated with amount of astigmatism. Meridional amblyopia (difference in best-corrected acuity for vertical vs horizontal gratings) was present in children with simple/compound myopic or mixed astigmatism, due to reduced acuity for horizontal gratings. There was no correlation between magnitude of meridional amblyopia and amount of astigmatism. Children with simple/compound hyperopic astigmatism showed no meridional amblyopia, but did show reduced acuity for both grating orientations. These results suggest that the neural changes that lead to amblyopia occur prior to age 3- to 5 years in astigmatic children.

Dobson, V., Miller, J. M., Harvey, E. M., Mohan, K.(2002). Amblyopia in astigmatic preschool children [Abstract]. Journal of Vision, 2( 10): 48, 48a, http://journalofvision.org/2/10/48/, doi:10.1167/2.10.48. [CrossRef]
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