Epithelial and stromal thickness profile and lens decentration in myopic orthokeratology / Perfil de espesor epitelial y estromal y descentrado del cristalino en ortoqueratología miope
J. optom. (Internet)
; 17(2): [100485], Abr-Jun, 2024. tab, ilus
Article
en En
| IBECS
| ID: ibc-231620
Biblioteca responsable:
ES1.1
Ubicación: ES15.1 - BNCS
ABSTRACT
Purpose: To study topographic epithelial and total corneal thickness changes in myopic subjects undergoing successful orthokeratology treatment in connection with the objective assessment of contact lens decentration. Methods: A prospective-observational and non-randomized study in 32 Caucasian myopic eyes undergoing Ortho-k for 3 months. Total, epithelial, and stromal thicknesses were studied before and after Ortho-k treatment, using optical coherence tomography with anterior segment application software. Central, paracentral, and mid-peripheral values are taken along 8 semi-meridians. Results: The central average total corneal thickness was 4.72 ± 1.04 μm thinner after Ortho-K. The paracentral corneal thickness showed no significant changes (p = 0.137), while the mid-peripheral corneal thickness was increased by 3.25 ± 1.6 μm associating this increase exclusively to the epithelial plot (p<0.001). When lens centration was assessed, a lens fitting decentration less than 1.0 mm was found for the whole sample, predominantly horizontal-temporal (87.5%) and vertical-inferior (50%) decentring. Corneal topographical analysis revealed a horizontal and vertical epithelial thickness asymmetric change profile with paracentral temporal thinnest values, and mid-peripheral nasal thickest values. Conclusions: The present study found a central corneal thinning induced by Ortho-k lenses in subjects with moderate myopia, only associated with a change in epithelial thickness, as well as mid-peripheral thickening, that seems to be mainly epithelial in origin. The authors also found a tendency of contact lens decentration toward temporal and inferior areas conditioning an asymmetric epithelial redistribution pattern.(AU)
Palabras clave
Texto completo:
1
Colección:
06-national
/
ES
Base de datos:
IBECS
Asunto principal:
Visión Ocular
/
Sustancia Propia
/
Tomografía de Coherencia Óptica
/
Procedimientos de Ortoqueratología
/
Cristalino
/
Miopía
Límite:
Female
/
Humans
/
Male
Idioma:
En
Revista:
J. optom. (Internet)
Año:
2024
Tipo del documento:
Article