Unexpectedly high corneal flap thickness and ectasia after mechanical LASIK
ABSTRACT LASIK is a refractive surgical procedure in which a corneal flap is created to expose the corneal stromal bed. Preoperative estimation of corneal flap thickness is necessary to calculate the percentage tissue altered in LASIK, an important quantitative risk factor for ectasia. The objective...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Sociedade Brasileira de Oftalmologia
2023-09-01
|
| Series: | Revista Brasileira de Oftalmologia |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-72802023000100514&tlng=en |
| _version_ | 1797688305373937664 |
|---|---|
| author | José Belucio Neto João Carlos Gonçalves Cruz Celso Busnelo Moreno Bernardo Kaplan Moscovici |
| author_facet | José Belucio Neto João Carlos Gonçalves Cruz Celso Busnelo Moreno Bernardo Kaplan Moscovici |
| author_sort | José Belucio Neto |
| collection | DOAJ |
| description | ABSTRACT LASIK is a refractive surgical procedure in which a corneal flap is created to expose the corneal stromal bed. Preoperative estimation of corneal flap thickness is necessary to calculate the percentage tissue altered in LASIK, an important quantitative risk factor for ectasia. The objective of this study was to assess flap thickness and calculate percentage tissue altered to check if unexpectedly thicker flaps and higher percentage tissue altered could pose as risk factors of ectasia. Four subjects (eight eyes) were submitted to mechanical LASIK in 2009 and 2010. Pre and postoperative clinical and tomographic data were reviewed. Mean preoperative estimated percentage tissue altered was 39.18±1.31%, which was borderline for increased ectasia risk when considering the limit of 40%. However, when considering the postoperatively measured flap thickness, the actual mean percentage tissue altered turned out to be 45.17 ± 4.13%, which was significantly higher than predicted preoperatively (p=0.002). Unexpectedly higher postoperative percentage tissue altered may be responsible for corneal ectasia after mechanical LASIK. |
| first_indexed | 2024-03-12T01:29:19Z |
| format | Article |
| id | doaj.art-76fad7cdfcf74c26a051f5d1d65563f6 |
| institution | Directory Open Access Journal |
| issn | 1982-8551 |
| language | English |
| last_indexed | 2024-03-12T01:29:19Z |
| publishDate | 2023-09-01 |
| publisher | Sociedade Brasileira de Oftalmologia |
| record_format | Article |
| series | Revista Brasileira de Oftalmologia |
| spelling | doaj.art-76fad7cdfcf74c26a051f5d1d65563f62023-09-12T07:40:57ZengSociedade Brasileira de OftalmologiaRevista Brasileira de Oftalmologia1982-85512023-09-018210.37039/1982.8551.20230043Unexpectedly high corneal flap thickness and ectasia after mechanical LASIKJosé Belucio Netohttps://orcid.org/0000-0002-0481-7996João Carlos Gonçalves Cruzhttps://orcid.org/0000-0002-9329-6247Celso Busnelo Morenohttps://orcid.org/0000-0002-8170-2922Bernardo Kaplan Moscovicihttps://orcid.org/0000-0003-4441-4304ABSTRACT LASIK is a refractive surgical procedure in which a corneal flap is created to expose the corneal stromal bed. Preoperative estimation of corneal flap thickness is necessary to calculate the percentage tissue altered in LASIK, an important quantitative risk factor for ectasia. The objective of this study was to assess flap thickness and calculate percentage tissue altered to check if unexpectedly thicker flaps and higher percentage tissue altered could pose as risk factors of ectasia. Four subjects (eight eyes) were submitted to mechanical LASIK in 2009 and 2010. Pre and postoperative clinical and tomographic data were reviewed. Mean preoperative estimated percentage tissue altered was 39.18±1.31%, which was borderline for increased ectasia risk when considering the limit of 40%. However, when considering the postoperatively measured flap thickness, the actual mean percentage tissue altered turned out to be 45.17 ± 4.13%, which was significantly higher than predicted preoperatively (p=0.002). Unexpectedly higher postoperative percentage tissue altered may be responsible for corneal ectasia after mechanical LASIK.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-72802023000100514&tlng=enRefractive surgical proceduresLasersexcimerKeratomileusislaser in situCorneaCorneal topography |
| spellingShingle | José Belucio Neto João Carlos Gonçalves Cruz Celso Busnelo Moreno Bernardo Kaplan Moscovici Unexpectedly high corneal flap thickness and ectasia after mechanical LASIK Revista Brasileira de Oftalmologia Refractive surgical procedures Lasers excimer Keratomileusis laser in situ Cornea Corneal topography |
| title | Unexpectedly high corneal flap thickness and ectasia after mechanical LASIK |
| title_full | Unexpectedly high corneal flap thickness and ectasia after mechanical LASIK |
| title_fullStr | Unexpectedly high corneal flap thickness and ectasia after mechanical LASIK |
| title_full_unstemmed | Unexpectedly high corneal flap thickness and ectasia after mechanical LASIK |
| title_short | Unexpectedly high corneal flap thickness and ectasia after mechanical LASIK |
| title_sort | unexpectedly high corneal flap thickness and ectasia after mechanical lasik |
| topic | Refractive surgical procedures Lasers excimer Keratomileusis laser in situ Cornea Corneal topography |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-72802023000100514&tlng=en |
| work_keys_str_mv | AT josebelucioneto unexpectedlyhighcornealflapthicknessandectasiaaftermechanicallasik AT joaocarlosgoncalvescruz unexpectedlyhighcornealflapthicknessandectasiaaftermechanicallasik AT celsobusnelomoreno unexpectedlyhighcornealflapthicknessandectasiaaftermechanicallasik AT bernardokaplanmoscovici unexpectedlyhighcornealflapthicknessandectasiaaftermechanicallasik |