May 2006
Volume 47, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2006
Monochromatic Ocular Aberrations in Australian Children, the Sydney Myopia Study
Author Affiliations & Notes
  • A.A. Martinez
    School of Optometry, UNSW, Sydney, Australia
  • P. Sankaridurg
    Vision Cooperative Research Centre, Sydney, Australia
  • D. Sweeney
    Vision Cooperative Research Centre, Sydney, Australia
  • K. Rose
    School of Applied Vision Sciences, University of Sydney, Sydney, Australia
  • P. Mitchell
    Department of Ophtalmology & Westmead Millenium Institute, Centre for Vision Research, Sydney, Australia
  • Footnotes
    Commercial Relationships  A.A. Martinez, None; P. Sankaridurg, None; D. Sweeney, None; K. Rose, None; P. Mitchell, None.
  • Footnotes
    Support  Australian Government through NHMRC and CRC scheme Grant 253732
Investigative Ophthalmology & Visual Science May 2006, Vol.47, 1177. doi:
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      A.A. Martinez, P. Sankaridurg, D. Sweeney, K. Rose, P. Mitchell; Monochromatic Ocular Aberrations in Australian Children, the Sydney Myopia Study . Invest. Ophthalmol. Vis. Sci. 2006;47(13):1177.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract
 
Purpose:
 

To assess ocular aberrations and differences if any, in the aberration profile between refractive error groups of eyes of Australian children in the Sydney Myopia Study.

 
Methods:
 

In this study, refractive error and ocular aberrations in a sub–sample of high school children (year 7, mostly aged 12 years) were obtained using a S–H aberrometer. Cycloplegic data from right eyes (PD>5mm) were analysed. Refractive error was defined as myopia for spherical equivalent (SE) <–0.50D, emmetropia for SE –0.50D to 0.50D and hyperopia for SE>0.50D. Eyes with astigmatism >1.00D were excluded. Monochromatic aberrations from second through sixth order were analyzed. Differences between groups were analyzed using multiple comparisons Tukey HSD, with significance set at p<0.05.

 
Results:
 

A total of 831 children with a mean age 12.6± 0.5 years (range 11.1 to 14.4) were examined. The dominant aberration across the subjects was Z2,0 followed by Z2,2 (Fig 1). Of the higher order aberrations, fifth and sixth order aberrations were small in magnitude. Significant differences were seen between the groups for Z3,–1 which was 0.04 ± 0.11 µm, 0.0004 ± 0.09 µm, –0.0004 ± 0.1 µm; and for Z4,0 which was 0.042 ± 0.06 µm, 0.044 ± 0.05 µm, 0.08 ± 0.06 µm for myopic, emmetropic and hyperopic children, respectively.

 
Conclusions:
 

The study establishes normative data for ocular aberrations for a population–based sample of 12–year old schoolchildren in Sydney, Australia. Of the ocular aberrations, low order aberrations were the dominant across the groups. Higher order aberrations were small in magnitude with differences seen between the refractive error groups for some third and fourth order aberrations. Considerable inter–subject variability in aberrations was seen and the role, if any, played by higher order aberrations in the development of myopia is unclear.  

 
Keywords: myopia • refractive error development 
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