April 2014
Volume 55, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2014
Induced astigmatism in patients undergoing combined surgery of phacoemulsification, intraocular lens implantation and trabeculectomy.
Author Affiliations & Notes
  • Carolina Prado
    Asociación Para Evitar La Ceguera en México I.A.P., Mexico City, Mexico
  • Maria Luisa Zavala Aznar
    Asociación Para Evitar La Ceguera en México I.A.P., Mexico City, Mexico
  • Sandra Karina Silva Romano
    Asociación Para Evitar La Ceguera en México I.A.P., Mexico City, Mexico
  • Rafael Castaneda Diez
    Asociación Para Evitar La Ceguera en México I.A.P., Mexico City, Mexico
  • Footnotes
    Commercial Relationships Carolina Prado, None; Maria Luisa Zavala Aznar, None; Sandra Karina Silva Romano, None; Rafael Castaneda Diez, None
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science April 2014, Vol.55, 6120. doi:
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      Carolina Prado, Maria Luisa Zavala Aznar, Sandra Karina Silva Romano, Rafael Castaneda Diez; Induced astigmatism in patients undergoing combined surgery of phacoemulsification, intraocular lens implantation and trabeculectomy.. Invest. Ophthalmol. Vis. Sci. 2014;55(13):6120.

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

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Abstract

Purpose: To determine the corneal astigmatism induced in patients after phacoemulsification with intraocular lens implantation and trabeculectomy. Keratometric changes were measured with an automated keratometer, patients were evaluated for a period of one year follow-up.

Methods: Observational retrospective study. Changes in keratometry were evaluated at 6 months and 1 year using scalar and vector analysis. All surgeries were performed by the same expert surgeon. In the scalar analysis, astigmatism was calculated as the difference in keratometry measurements in absolute values.

Results: 28 patients were included in this study, 24 (84.7%) men and 4 (14.28%) women. The mean age was 75.6 years (±6.8). Preoperative evaluation of corneal astigmatism revealed that 42.9% of patients had a with-the-rule, 39.3% against-the-rule and 17.9% had an oblique astigmatism. In the scalar analysis, surgical induced astigmatism at 6 months was -0.45 Diopters (D) (±0.36) and -0.42 D at 1 year (±0.44). Both at 6 months and 1 year, the maximum value of induced astigmatism was -1.5 D. Through vector analysis, the average of the surgically induced astigmatism was -0.91 D (±0.74) at 6 months and -0.90 D (±0.72) at 1 year. The maximum values of induced astigmatism were -2.83 and -2.26 at 6 months and 1 year respectively.

Conclusions: We observed that after a combined surgery of phacoemulsification with intraocular lens implantation and trabeculectomy, any form of astigmatism tends to shift towards a with-the-rule astigmatism.

Keywords: 428 astigmatism • 678 refractive surgery  
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