[Post-lasik corneal ectasia in patients with significant differences in keratometry readings between both eyes].
OBJECTIVE
A study is made on the incidence of corneal ectasia after laser in situ keratomileusis (LASIK) in patients with large differences in mean keratometry (MK) readings between both eyes (OU). Visual outcomes were also evaluated.


METHODS
The medical records of 164,603 patients (315,259 eyes) who underwent LASIK from January 2003 to December 2011 were reviewed in order to identify patients with a difference in MK of ≥ 1.25 D between OU. The main outcome measures were incidence of ectasia after LASIK, and visual outcome.


RESULTS
A total of 35 eyes that met the inclusion criteria were found. Functional and visual results were those expected for myopia studies. After a minimum follow-up of 2 years, no corneal ectasia was found in 3 eyes (2 patients).


CONCLUSIONS
The possibility of finding a patient with an asymmetry in MK and normal topography is low (0.021%), and it does not seem to be a contraindication of LASIK. Although no corneal ectasia was found in this case series, and as it is a potentially sight-threatening complication, patients with very different MK between OU should be studied carefully before undergoing LASIK.
Departamento de Catarata y Cirugía Refractiva, Clínica Baviera, Bilbao, España. Electronic address: jortega@clinicabaviera.com.
J
J
Ortega-Usobiaga
Departamento de Catarata y Cirugía Refractiva, Clínica Baviera, Bilbao, España.
F
F
Llovet-Osuna
Departamento de Catarata y Cirugía Refractiva, Clínica Baviera, Bilbao, España.
M R
MR
Djodeyre
Departamento de Catarata y Cirugía Refractiva, Clínica Baviera, Bilbao, España.
A
A
Llovet-Rausell
Departamento de Investigación y Desarrollo, Clínica Baviera, Valencia, España.
J
J
Beltran-Sanz
Departamento de Catarata y Cirugía Refractiva, Clínica Baviera, Bilbao, España.
J
J
Baviera-Sabater
D000328:Adult; D003316:Corneal Diseases / Q000209:etiology* / Q000473:pathology; D019781:Corneal Topography; D004108:Dilatation, Pathologic / Q000209:etiology; D005260:Female; D006801:Humans; D020731:Keratomileusis, Laser In Situ / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies
Complicaciones; Complications; Corneal ectasia; Corneal topography; Ectasia corneal; Keratometry; LASIK; Queratometría; Topografía corneal