June 2013
Volume 54, Issue 15
Free
ARVO Annual Meeting Abstract  |   June 2013
Impact of Ultrasound Biomicroscopy (UBM) versus White-to-White (WTW) measurement on sizing of Visian Implantable Collamer Lens (ICL) and Residual Postoperative Refraction
Author Affiliations & Notes
  • Puneet Panda
    Ophthalmology, Mount Sinai Medical Center, New York, NY
  • Ann Ostrovsky
    Laser and Corneal Surgery Associates, PC, New York, NY
  • Scott Brodie
    Ophthalmology, Mount Sinai Medical Center, New York, NY
  • Mark Speaker
    Laser and Corneal Surgery Associates, PC, New York, NY
  • Footnotes
    Commercial Relationships Puneet Panda, None; Ann Ostrovsky, None; Scott Brodie, None; Mark Speaker, None
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science June 2013, Vol.54, 850. doi:
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      Puneet Panda, Ann Ostrovsky, Scott Brodie, Mark Speaker; Impact of Ultrasound Biomicroscopy (UBM) versus White-to-White (WTW) measurement on sizing of Visian Implantable Collamer Lens (ICL) and Residual Postoperative Refraction. Invest. Ophthalmol. Vis. Sci. 2013;54(15):850.

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

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Abstract

Purpose: The aim of this work is to compare residual postoperative refractive error after implantation of Visian Implantable Collamer Lens (ICL) in patients having the lenses sized with either Ultrasound Biomicroscopy (UBM) or white-to-white (WTW) measurements, and to determine if the residual refraction correlates with amount of postoperative lens vault.

Methods: This cohort study included 33 eyes that underwent Visian ICL implantation. Sulcus-to-sulcus (STS) distances were determined using Ultrasound UBM in 23 eyes and with caliper assisted white-to-white (WTW) measurements in 10 eyes. Manifest refractions (spherical equivalents) and central lens vaults were compared between the two groups at the postoperative month 1 visit, using two-sample t-tests.

Results: The pre-operative mean spherical equivalent (MSE) for all 33 patients was -10.97 diopters (D) (range: -5.37 D to -17.13 D). The pre-operative MSE was -10.18D for the UBM group, and -12.78D for the WTW group, respectively. The postoperative MSE was -0.43+/- 0.43D for the UBM group and -0.85 +/-0.53D for the WTW group (p=0.02). Postoperative mean central vault height was 495 +/- 167um in the UBM group and 710 +/- 250um in the WTW group (p>0.05).

Conclusions: This study suggests that UBM valuation of STS distance results in more precise sizing of the ICL implant and consequently in more accurate refractive outcomes. Effective lens position, reflected by postoperative lens vault may be a factor in postoperative refractive outcome. Residual refractive error was often the result of astigmatism in some patients.

Keywords: 567 intraocular lens • 685 refractive surgery: phakic IOL • 678 refractive surgery  
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