• Users Online: 262
  • Home
  • Print this page
  • Email this page
Home About us Editorial board Ahead of print Current issue Search Archives Submit article Instructions Subscribe Contacts Login 
Year : 2016  |  Volume : 17  |  Issue : 2  |  Page : 49-55

Surface quality of human corneal SMILE lenticules in comparison with microkeratome free caps

1 Department of Ophthalmology, Faculty of Medicine, Alexandria University, Alexandria, Egypt
2 Department of Histology, Faculty of Medicine, Alexandria University, Alexandria, Egypt

Correspondence Address:
Ihab M Osman
Department of Ophthalmology, Faculty of Medicine, Alexandria University, Alexandria 2667
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/1110-9173.189471

Rights and Permissions

Purpose The aim of this study was to compare electron microscopic morphological images of the posterior surface of corneal lenticules removed during femtosecond laser small-incision lenticule extraction (SMILE) with free corneal caps created using a mechanical microkeratome. Design An in-vitro comparative study was carried out including 30 human corneal lenticules from 15 patients who underwent bilateral SMILE refractive procedure (SMILE group) using the 500 kHz VisuMax femtosecond laser and 20 cadaveric donor corneas that were cut creating free caps using the Moria M2 microkeratome. Setting The present study was carried out at Roayah Vision Correction Center and Faculty of Science, Alexandria University. Participants and methods A total of 15 SMILE lenticules and 15 microkeratome free caps were examined by scanning electron microscopy (SEM), and another 15 SMILE lenticules and five microkeratome free caps were examined by transmission electron microscopy. The JEOL JSM-5300LV SEM was used for observations. A new scoring system was used for comparison. Results The surface and edge of SMILE lenticules showed more roughness in the form of tissue bridges, dome-shaped elevations, more cavitational changes, and tiny tissue fragments compared with the undersurface of free corneal microkeratome caps, but the difference was not statistically significant on SEM (P=0.40654). Conclusion SMILE induces corneal surface roughness and structural changes that are slightly more pronounced than those induced by the microkeratome. The observed changes may cause surgically induced optical aberrations. Energy settings still need further adjustment to be able to create reproducible, predictable smooth surfaces in lenticules of SMILE cases.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded166    
    Comments [Add]    

Recommend this journal