April 2014
Volume 55, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2014
Software-based assesment of intrastromal rings surgical plan for keratoconus
Author Affiliations & Notes
  • Roberto Albertazzi
    Cornea, Centro de ojos quilmes, quilmes, Argentina
  • Leonardo Ferlini
    Cornea, Centro de ojos quilmes, quilmes, Argentina
  • Guillermo Rao
    Cornea, Centro de ojos quilmes, quilmes, Argentina
  • Jesus Merayo-Lloves
    Fundación de Investigacion Oftalmologica, oviedo, Spain
    University of Oviedo, Oviedo, Spain
  • Jose Alfonso
    Fundación de Investigacion Oftalmologica, oviedo, Spain
    University of Oviedo, Oviedo, Spain
  • Footnotes
    Commercial Relationships Roberto Albertazzi, Keratoconus Easy Fix (I); Leonardo Ferlini, None; Guillermo Rao, None; Jesus Merayo-Lloves, None; Jose Alfonso, None
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science April 2014, Vol.55, 4225. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Roberto Albertazzi, Leonardo Ferlini, Guillermo Rao, Jesus Merayo-Lloves, Jose Alfonso; Software-based assesment of intrastromal rings surgical plan for keratoconus. Invest. Ophthalmol. Vis. Sci. 2014;55(13):4225.

      Download citation file:


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

      ×
  • Supplements
Abstract
 
Purpose
 

To develop and validate a novel automated software, Keratoconus Easy Fix®, to assess intrastromal rings (ICRS) surgical plans for keratoconus.

 
Methods
 

We developed a novel software that uses the data inserted by the surgeon and correlates this information with normograms, provided by manufacturer and modified by Dr. Albertazzi, giving as result a surgical plan indicating which ICRS should be used, ring position, and incision location. A Single-center, retrospective, noncomparative series of 62 eyes (45 patients) was conducted using the surgical plans provided by the software. Patients name, clinical ID, keratoconus topography type, subjective refraction with sphere, astigmatism with axis or theoric refraction with Kf and Ks with respective axis must be inserted for software analysis and surgical plan result. All patients had at least 6-month follow-up. Main outcome measures were evaluated as a reduction of the keratometric (K) values: K minimal (Kmin) and K maximal (Kmax)).Visual outcome were measured as improve in uncorrected distance visual acuity (UDVA), best corrected visual acuity (CDVA), and refractive error (myopia and astigmatism) reduction (decimal scale). Data were processed with R-programing language for descriptive and inference statistical analysis. All patients were informed and consented use of the software.

 
Results
 

There were a significant reduction of keratometric values Kmax ( Kmax-pre 49,72 ± 4,36 to Kmax-post 46,84 ± 3,59). Regarding VA there were a significative (p<0.01) reduction: Mean UDVA change from 0,31 ± 0,22 to 0,56 ± 0,31;. Mean DCVA from 0,73 ± 0,23 to 0,81 ± 0,21. Myopic and astigmatism components were highly reduced after ICRS implantation (P < 0.01). Myopia was reduced from -2,64± 3,34 to -1,81 ± 2,78. Astigmatism was reduced from -2,99 ± 1,63 to -1,01 ± 1,36. No intraoperative and postoperative complications occurred in these eyes.

 
Conclusions
 

Keratoconus Easy Fix®, is an effective, user-friendly software that provides ICRS surgical plans with good postsurgical result. This program should be used to asses keratoconus surgeons but mustn’t be replaced by a good and detail clinical evaluation, the final decision is always a surgeons responsibility.

     
Keywords: 574 keratoconus • 682 refractive surgery: other technologies • 579 learning  
×
×

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.

×