May 2008
Volume 49, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2008
Age-Related Changes in Subjective Astigmatism and Corneal Astigmatism
Author Affiliations & Notes
  • E. Costantini
    service 5, 15-20 National Hospital of Ophthalmology, Paris, France
  • O. Touzeau
    service 5, 15-20 National Hospital of Ophthalmology, Paris, France
  • R. Kopito
    service 5, 15-20 National Hospital of Ophthalmology, Paris, France
  • T. Gaujoux
    service 5, 15-20 National Hospital of Ophthalmology, Paris, France
  • J. C. Gavrilof
    service 5, 15-20 National Hospital of Ophthalmology, Paris, France
  • C. Agate
    Hospital, Luxembourg, Luxembourg
  • V. M. Borderie
    service 5, 15-20 National Hospital of Ophthalmology, Paris, France
  • L. Laroche
    service 5, 15-20 National Hospital of Ophthalmology, Paris, France
  • Footnotes
    Commercial Relationships  E. Costantini, None; O. Touzeau, None; R. Kopito, None; T. Gaujoux, None; J.C. Gavrilof, None; C. Agate, None; V.M. Borderie, None; L. Laroche, None.
  • Footnotes
    Support  None.
Investigative Ophthalmology & Visual Science May 2008, Vol.49, 1028. doi:https://doi.org/
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    • Get Citation

      E. Costantini, O. Touzeau, R. Kopito, T. Gaujoux, J. C. Gavrilof, C. Agate, V. M. Borderie, L. Laroche; Age-Related Changes in Subjective Astigmatism and Corneal Astigmatism. Invest. Ophthalmol. Vis. Sci. 2008;49(13):1028. doi: https://doi.org/.

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

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Abstract

Purpose: : To analyze the influence of the age on subjective (refractive) astigmatism and on corneal astigmatism in a normal population.

Methods: : We prospectively recorded the subjective refraction and topography (Orbscan) of 500 healthy eyes (including ametropia) of 250 patients (age range: 9 to 97 years). Polar values (cylinder, axis) of regular astigmatism were transformed into rectangular coordinates (x,y) in a dioptric plane. WTR/ATR component (ortho-astigmatism 0°/90°JCC ), oblique component (45°/135°JCC) and mirror-image symmetry (enantiomorphism) of astigmatism were quantified. The different characteristics of the astigmatism were correlated to the age.

Results: : While the magnitude of subjective astigmatism does not significantly change with the age (p=0.42), the axis is significantly influenced by the age: the WTR/ATR component is more influenced by the age than the oblique component (r=0.36 p<0.001 and r=0.09 p=0.02). The prevalence of the WTR astigmatism increases with age from nearly 10% in individuals younger than 60 years up to 39% in individuals older than 60 years (p<0.001). The age-related diminution of enantiomorphism (r=0.17 p=0.007) is more related to a diminution of the mirror symmetry of the axis between both eyes (p=0.005) than to a cylindrical asymmetry (p=0.16). Corneal astigmatism is more enantiomorph than subjective astigmatism (p=0.01). The irregularity of the corneal surface and the irregular astigmatism increase with the age (r=0.32 p<0.001 and r=0.12 p<0.001).

Conclusions: : The origin of age-related changes of the axis (inversion and diminution of enantiomorphism) is mainly corneal. Finally most of the characteristics of the subjective and corneal astigmatism vary with aging.

Keywords: aging • astigmatism • refraction 
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