Ítem
Acceso Abierto
Refractive changes after two years accelerated corneal cross-linking in patients with keratoconus
Título de la revista
Autores
Rosenstiehl, Shirley
Mora, Matilde
Rios, Hernán Andres
Lonngi, Marcela
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Fecha
2018-11-01
Directores
Mora, Matilde
mora
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Editor
Universidad del Rosario
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Resumen
Abstract
Purpose: To describe the visual and topographical changes after accelerated corneal collagen cross-linking (ACXL) in keratoconus-affected eyes. Methods: Clinical records of patients with
keratoconus-affected eyes that underwent ACXL treatment and had 24 months of follow-up
were reviewed. Data regarding demographics, visual acuity (VA), refraction and Sheimpflug
values before and post ACXL were analyzed. We included patients with keratoconus older
than 12 years old, with corneal thickness greater than 400 microns and steepest keratometry
<60 diopters by Sheimpflug (Pentacam), with reported uncorrected distant visual acuity
(UDVA), manifest refraction and best-corrected visual acuity (BCVA) evaluation pre ACXL
and 24 months after surgery. The exclusion criteria were: history of ocular trauma, anterior
segment surgery, retinal detachment or any type of maculopathy. Results: 21 eyes were included. Mean age was 27 years. Mean uncorrected distant VA (UDVA) before the procedure was 1.01 logMAR (20/200 Snellen) and after 24 months improved significantly to 0.62 logMAR (20/83 Snellen) with a p value of 0.005. No statistical significant difference was found between preoperative and postoperative refractive, keratometric and pachymetric data. Induced astigmatism value was -1.11 D (range 0.13 D – 2.28 D). Conclusions: ACXL is a technique to prevent the progression of keratoconus, however refractive and VA changes could be expected after procedure. The observed changes must be considered when performing the procedure together with refractive surgery.
Palabras clave
Collagen cross-linking , Refractive changes , Induced astigmatism
