May 2004
Volume 45, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2004
Long–trem Course of Surgically Induced Astigmatism in Children Following Cataract Extraction via Clear Corneal Incision
Author Affiliations & Notes
  • S. Guo
    Ophthalmology, New Jersey Med School, Newark, NJ
  • B. Ayres
    Ophthalmology, New Jersey Med School, Newark, NJ
  • H. Jason
    Ophthalmology, New Jersey Med School, Newark, NJ
  • P. Chiang
    Ophthalmology, New Jersey Med School, Newark, NJ
  • N. Ni
    Harvard Uinversity, Cambridge, MA
  • Footnotes
    Commercial Relationships  S. Guo, None; B. Ayres, None; H. Jason, None; P. Chiang, None; N. Ni, None.
  • Footnotes
    Support  none
Investigative Ophthalmology & Visual Science May 2004, Vol.45, 310. doi:
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      S. Guo, B. Ayres, H. Jason, P. Chiang, N. Ni; Long–trem Course of Surgically Induced Astigmatism in Children Following Cataract Extraction via Clear Corneal Incision . Invest. Ophthalmol. Vis. Sci. 2004;45(13):310.

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

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Abstract

Abstract: : Purpose: To determine the surgically induced astigmatic effect of clear corneal cataract incisions in pediatric patients after cataract surgery. Methods: Visual acuity and keratometric values from 23 eyes from 15 patients with a mean age of 9.6 years was reviewed retrospectively. All patients had undergone clear corneal cataract surgery with the cataract incision made in the axis of the steep corneal axis. Pre and postoperative keratometric values were then used to calculate pre and post operative keratometric astigmatism and also used to calculate the surgically induced refractive change (SIRC) using the Holliday ten–step method. The data collected was then organized into three groups, data occurring 1 to 3 months, 3 to 12 months, and at or after one year post operative. Results: Keratometric subtraction showed a consistent downward trend in induced astigmatism at all post operative time intervals. Calculation of the surgically induced refractive change showed a statistically significant change (between 0.92D, and 1.24D) with a greater degree of astigmatism induced in younger patients. We also show that the astigmatic change varies greatly for the first post operative year and then slowly returns to early post operative values. Discussion: Astigmatic change after clear corneal incisions is well documented. Our data shows that in the pediatric population the surgically induced change is greater in magnitude than what is typically observed in the adult population. The induced astigmatism is also stable over time, but the time to stabilization is often longer than one year making frequent repeated refraction necessary in prevention of amblyopia. In summary the pediatric eye does not respond to clear corneal cataract surgery in the same fashion as the adult eye. This information may be valuable in surgical planning and post operative management and prevention of amblyopia in the pediatric cataract patient.

Keywords: astigmatism • cataract • refraction 
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