June 2015
Volume 56, Issue 7
Free
ARVO Annual Meeting Abstract  |   June 2015
Keratometric outcomes for femtosecond laser-assisted limbal relaxing incisions
Author Affiliations & Notes
  • Phillip Rubin
    Hofstra North Shore-LIJ School of Medicine, Hempstead, NY
  • Matthew Gorski
    Ophthalmology, North Shore-LIJ Health System, Great Neck, NY
    Ophthalmology, Manhattan Eye, Ear, and Throat Hospital, New York, NY
  • Carolyn Shih
    Ophthalmology, North Shore-LIJ Health System, Great Neck, NY
  • Footnotes
    Commercial Relationships Phillip Rubin, None; Matthew Gorski, None; Carolyn Shih, None
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science June 2015, Vol.56, 3919. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Phillip Rubin, Matthew Gorski, Carolyn Shih; Keratometric outcomes for femtosecond laser-assisted limbal relaxing incisions. Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):3919.

      Download citation file:


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

      ×
  • Supplements
Abstract
 
Purpose
 

Limbal relaxing incisions (LRI) are commonly used to reduce astigmatism. In recent years, the femtosecond laser has emerged as an alternative to manual incisional techniques due to greater perceived accuracy, precision, and safety. We performed a retrospective study to assess the keratometric results of femtosecond laser-assisted arcuate keratotomy in the treatment of corneal astigmatism.

 
Methods
 

Preoperative and postoperative corneal topographic astigmatism measured with an Orbscan II (Bausch + Lomb) were retrospectively analyzed in consecutive patients who underwent fsLRI between March 2011 and June 2014. A single surgeon performed all procedures using an IntraLase Femtosecond Laser (Abbott Medical Optics Inc.) Incisional depth was set at 90% of central corneal thickness. Changes in topographic astigmatism were calculated and significance was determined by paired student’s t-test. Regression methods were used to analyze the relationship between patient and surgical variables and changes in topographic astigmatism.

 
Results
 

The study included 25 eyes of 20 patients (16 females, 4 males) with a mean age of 68.1 ± 10.3. Mean preoperative astigmatism was 2.0 ± 1.1D (0.7-4.7D). Postoperatively, astigmatism was reduced by a mean of 0.8 ± 0.6D (p<0.00001). Univariate linear regression analysis of astigmatic reduction as a function of arc length showed a moderate positive correlation R=0.69 (p<0.001). No significant correlation was found from separate univariate regression models of astigmatic reduction as a function of central corneal thickness (R=0.09, p=0.7) or diameter of LRI placement (R=0.01, p=0.9). A multivariable regression model of postoperative astigmatic reduction as a function of central corneal thickness, arc length, and diameter gave a positive correlation R=0.74 (p<0.001). In this model, arc length was a significant predictor of astigmatic reduction (p<0.0001) but corneal thickness (p=0.28) and diameter (p=0.07) were not significant.

 
Conclusions
 

FSLRI was effective in reducing corneal topographic astigmatism although responses were variable. There was no association between reduction in topographic astigmatism and central corneal thickness or diameter of incision placement. The degree of astigmatic reduction was positively correlated with arc length but only moderately.

 
×
×

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.

×