April 2014
Volume 55, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2014
Safety topographic parameters for LASIK surgery with Pentacam®
Author Affiliations & Notes
  • Ana Elena Gutierrez Farach
    Cornea, Hospital de la Luz, Mexico, Mexico
  • Oscar Fernandez
    Cornea, Hospital de la Luz, Mexico, Mexico
  • Regina Velasco
    Cornea, Hospital de la Luz, Mexico, Mexico
  • Alejandro Babayan
    Cornea, Hospital de la Luz, Mexico, Mexico
  • Cristina Pacheco Del Valle
    Cornea, Hospital de la Luz, Mexico, Mexico
  • Elisa Dessire Alegria
    Cornea, Hospital de la Luz, Mexico, Mexico
  • Oscar Baca
    Cornea, Hospital de la Luz, Mexico, Mexico
  • Footnotes
    Commercial Relationships Ana Elena Gutierrez Farach, None; Oscar Fernandez, None; Regina Velasco, None; Alejandro Babayan, None; Cristina Pacheco Del Valle, None; Elisa Alegria, None; Oscar Baca, None
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science April 2014, Vol.55, 2479. doi:
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    • Get Citation

      Ana Elena Gutierrez Farach, Oscar Fernandez, Regina Velasco, Alejandro Babayan, Cristina Pacheco Del Valle, Elisa Dessire Alegria, Oscar Baca, Hospital de la Luz; Safety topographic parameters for LASIK surgery with Pentacam®. Invest. Ophthalmol. Vis. Sci. 2014;55(13):2479.

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

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Abstract
 
Purpose
 

Describe security topographic patterns with Pentacam to select candidates for LASIK surgery and prevent post-LASIK ectasia development.

 
Methods
 

Literature review of 50 articles from 2003 to 2013 of major ophthalmic journals, obtained from PubMed, Ovid, Medline and Trip database.

 
Results
 

The evaluation of pachymetric and elevation maps plays an important role to discriminate between normal and ectatic corneas, where the posterior elevation map had the greatest predictive value. The combination in the analysis of the maps in the module Belin Ambrosio, with improved best-fit sphere (BEST) and the index of pachymetric progression, allows an early detection of ectasia and finally the module that evaluates keratoconus index enables to assess the status of the corneal surface, highlighting its greater specificity for detecting ectasia the keratoconus index (K1), keratoconus central index (CK1) asymmetry on elevation index (IHA) and the offset by elevation index (IHD).

 
Conclusions
 

Pentacam® is a unique imaging system that uses a rotating Scheimpflug camera, providing greater precision. This procedure allows the evaluation of elevation maps in different modules for early detection of ectasia and appropriate selection of patients eligible for LASIK surgery.

 
Keywords: 733 topography • 574 keratoconus • 551 imaging/image analysis: non-clinical  
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