June 2017
Volume 58, Issue 8
Open Access
ARVO Annual Meeting Abstract  |   June 2017
Outcomes of the Haigis-L formula for calculating intraocular lens power after myopic and hyperopic laser refractive surgery in a tertiary teaching hospital
Author Affiliations & Notes
  • Valerie P J Saw
    Cornea & Cataract, Moorfields Eye Hospital, London, Other (Non U.S.), United Kingdom
    UCL Institute of Ophthalmology, London, Other (Non U.S.), United Kingdom
  • Claudia Da Costa Paula
    Cornea & Cataract, Moorfields Eye Hospital, London, Other (Non U.S.), United Kingdom
  • Yusrah Shweikh
    Cornea & Cataract, Moorfields Eye Hospital, London, Other (Non U.S.), United Kingdom
  • Rajesh Deshmukh
    Cornea & Cataract, Moorfields Eye Hospital, London, Other (Non U.S.), United Kingdom
  • Marie Restori
    Biometry Department, Moorfields Eye Hospital, London, United Kingdom
  • Footnotes
    Commercial Relationships   Valerie Saw, None; Claudia Da Costa Paula, None; Yusrah Shweikh, None; Rajesh Deshmukh, None; Marie Restori, None
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science June 2017, Vol.58, 1150. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to Subscribers Only
      Sign In or Create an Account ×
    • Get Citation

      Valerie P J Saw, Claudia Da Costa Paula, Yusrah Shweikh, Rajesh Deshmukh, Marie Restori; Outcomes of the Haigis-L formula for calculating intraocular lens power after myopic and hyperopic laser refractive surgery in a tertiary teaching hospital. Invest. Ophthalmol. Vis. Sci. 2017;58(8):1150.

      Download citation file:


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

      ×
  • Supplements
Abstract

Purpose : Reduced accuracy of intraocular lens (IOL) power calculation in eyes with previous corneal refractive surgery is a clinical challenge. Many studies report single surgeon outcomes, and there is limited data on outcomes of the Haigis-L hyperopic formula. In this study we report outcomes from a tertiary teaching hospital using the IOL Master Haigis-L formula in patients who have had previous myopic or hyperopic LASIK or PRK.

Methods : Retrospective case series of all patients with previous refractive surgery who had uneventful phacoemulsification surgery with IOL power calculation using the IOL Master Haigis-L formula at Moorfields Eye Hospital between January 2012 and April 2015. Exclusion criteria were complicated surgery, coexisting conditions potentially confounding the refraction, lack of information about myopic vs hyperopic surgery, and implantation of a multifocal or toric IOL. Statistical analysis: mean values were compared using the Student t test if normally distributed. The Fisher chi-square test was used to analyze proportions. P values were 2 sided with significance of less than 0.05.

Results : 63 eyes (44 patients) were analysed. Mean patient age was 63 ± 9.7 years. 58248 eyes (76%) had previous myopic laser surgery; 42/48 eyes (87.5%) had axial lengths >25.0mm. 15 eyes (24%) had previous hyperopic laser. For myopic Haigis-L, the mean arithmetic prediction (MAPD) error was -0.58 D ± 1.46 and the mean absolute (MA) error was 1.2 D ± 1.01. For hyperopic Haigis-L, the MAPD error was 0.07 D ± 0.84 D and the MA error was 0.67 D ± 0.47. Predictability of being within ±0.50 D and ±1.00 D of target was 25.0% and 52.1% for myopic eyes, and 33.3% and 66.7 % for hyperopic eyes. Comparison to the average IOL power recommended by the ASCRS online calculator for myopic eyes showed a higher IOL power was selected.

Conclusions : The arithmetic prediction error for myopic Haigis-L in this study is larger than previously described, but close to that reported in eyes with axial length >25mm. Using the ASCRS IOL calculator in myopic laser eyes would give less myopic outcomes. The hyperopic Haigis-L algorithm demonstrated accuracy in predicting and achieving target outcomes.

This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.

×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×