March 2012
Volume 53, Issue 14
Free
ARVO Annual Meeting Abstract  |   March 2012
Intraocular Lens Power Calculation after Myopic or Hyperopic Laser Vision Correction Using Optical Coherence Tomography
Author Affiliations & Notes
  • Maolong Tang
    Casey Eye Institute, Oregon Health and Science University, Portland, Oregon
  • Li Wang
    Cullen Eye Institute, Baylor College of Medicine, Houston, Texas
  • Douglas D. Koch
    Cullen Eye Institute, Baylor College of Medicine, Houston, Texas
  • Yan Li
    Casey Eye Institute, Oregon Health and Science University, Portland, Oregon
  • David Huang
    Casey Eye Institute, Oregon Health and Science University, Portland, Oregon
  • Footnotes
    Commercial Relationships  Maolong Tang, Optovue Inc. (F); Li Wang, None; Douglas D. Koch, None; Yan Li, Optovue Inc. (F); David Huang, Optovue Inc. (F, C, P, R)
  • Footnotes
    Support  NEI EY 018184
Investigative Ophthalmology & Visual Science March 2012, Vol.53, 3612. doi:
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    • Get Citation

      Maolong Tang, Li Wang, Douglas D. Koch, Yan Li, David Huang; Intraocular Lens Power Calculation after Myopic or Hyperopic Laser Vision Correction Using Optical Coherence Tomography. Invest. Ophthalmol. Vis. Sci. 2012;53(14):3612.

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

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Abstract

Purpose: : To use optical coherence tomography (OCT) to measure corneal power and calculate intraocular lens (IOL) power in cataract surgeries after myopic or hyperopic laser vision correction (LVC).

Methods: : Patients with previous myopic or hyperopic LVC were enrolled in this prospective study at two centers (Doheny Eye Institute, Los Angeles, CA, Cullen Eye Institute, Houston, TX and Casey Eye Institute, Portland, OR). Corneal power was measured with a Fourier-domain OCT system. Axial length, anterior chamber depth, and automated keratometry were measured with the IOLMaster. An OCT-based IOL formula was developed. The mean absolute error (MAE) of refractive prediction for OCT-based IOL formula was calculated. The results were compared with the MAE for Haigis-L formula.

Results: : A total of 39 eyes of 39 subjects who had uncomplicated cataract surgery with monofocal IOL implantation were enrolled in the 3 sites. Thirty-one eyes had previous myopic LVC ranged from -12.46 D to -0.88 D. Eight eyes had previous hyperopic LVC ranged from 0.66D to 5.52D. For the myopic LVC group, the OCT formula had a MAE of 0.63 D compared to an MAE of 0.68 D for the Haigis-L formula (p = 0.74). For the hyperopic LVC group, the MAE for OCT and Haigis-L formula was 0.26 D and 0.54 D respectively (p > 0.05).

Conclusions: : The predictive accuracy of OCT-based IOL power calculation is equivalent to current standards for post-LVC eyes. More eyes are being enrolled, and updated results will be presented at the meeting.

Clinical Trial: : http://www.clinicaltrials.gov NCT00532051

Keywords: imaging methods (CT, FA, ICG, MRI, OCT, RTA, SLO, ultrasound) • intraocular lens 
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