May 2005
Volume 46, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2005
The Correction of Corneal Astigmatism With Silicone Toric IOLs at the Time of Cataract Surgery
Author Affiliations & Notes
  • D. Manasses
    Ophthalmology, Frimley Park Hosp, Frimley, United Kingdom
  • J.A. Govan
    Ophthalmology, Frimley Park Hosp, Frimley, United Kingdom
  • Footnotes
    Commercial Relationships  D. Manasses, None; J.A. Govan, None.
  • Footnotes
    Support  None.
Investigative Ophthalmology & Visual Science May 2005, Vol.46, 816. doi:
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      D. Manasses, J.A. Govan; The Correction of Corneal Astigmatism With Silicone Toric IOLs at the Time of Cataract Surgery . Invest. Ophthalmol. Vis. Sci. 2005;46(13):816.

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Abstract

Abstract: : Purpose: To study the effectiveness of a 3 piece silicone toric intraocular lens in the correction of corneal astigmatism at the time of cataract surgery. Methods: 7 Patients (8 Eyes) who had corneal astigmatism of greater than 2 diopters measured at the time of pre–operative biometry had toric IOLs, with newer Z– haptics to prevent lens rotation, inserted at the time of phacoemulsification. Pre–operative refractive data were compared with the refractive data from one month post–operatively both by numerical comparison of the amount of cylinder and by vector analysis. Previous studies with plate haptic toric IOLs have shown a mean post–operative astigmatism of 0.85 – 1.00 diopters of astigmatism. Results: Mean pre–operative corneal astigmatism was –3.375 D. Mean post–operative refractive astigmatism was –0.375 D. The mean difference from the predicted post–operative astigmatism was –0.24 D. Conclusions: This lens was able to correct more than 4 dioptres of corneal astigmatism, which is more than previously studied plate haptic toric IOLs. The results show that toric IOLs are a useful way of correcting corneal astigmatism in patients who are undergoing phakoemulsification, without the need to significantly change the surgeon’s operative procedure or learn new techniques.

Keywords: astigmatism • cataract 
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