Characteristic Higher-Order Aberrations of the Anterior and Posterior Corneal Surfaces in 3 Corneal Transplantation Techniques
| Autor: | Shizuka Koh, Naoyuki Maeda, Takashi Fujikado, Ritsuko Higashiura, Makoto Saika, Tomoya Nakagawa, Toshifumi Mihashi, Kohji Nishida |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
medicine.medical_specialty
Corneal Wavefront Aberration genetic structures medicine.medical_treatment Scheimpflug principle Corneal Diseases Corneal Transplantation Ophthalmology medicine Humans Corneal surface Corneal transplantation Aged Retrospective Studies Lower anterior Corneal topographer business.industry Endothelium Corneal Epithelium Corneal Outcome measures Corneal Topography Middle Aged Descemet stripping automated endothelial keratoplasty eye diseases Surgery Aberrations of the eye Case-Control Studies sense organs business Descemet Stripping Endothelial Keratoplasty Keratoplasty Penetrating |
| Zdroj: | American Journal of Ophthalmology. 153:284-290.e1 |
| ISSN: | 0002-9394 |
| DOI: | 10.1016/j.ajo.2011.06.027 |
| Popis: | To investigate the corneal higher-order aberrations (HOAs) of the anterior and posterior corneal surfaces in eyes that underwent penetrating keratoplasty (PK), deep anterior lamellar keratoplasty (DALK), and Descemet stripping automated endothelial keratoplasty (DSAEK).Retrospective, case-control study.study population: Twenty-four eyes underwent PK, 28 eyes underwent DALK, and 19 eyes underwent DSAEK; 29 normal eyes served as controls. observation procedures: The anterior and posterior corneal heights and pachymetric data were obtained with a Scheimpflug-based corneal topographer. Corneal HOAs for 4-mm pupils were calculated from the height data and were expanded with normalized Zernike polynomials. The HOAs resulting from the anterior and posterior corneal surfaces were compared among the procedures. main outcome measures: Anterior and posterior corneal HOAs (root mean square).Control eyes had significantly lower total HOAs and Zernike vector terms of the anterior and posterior surfaces than the other groups, except for spherical aberration. The mean anterior corneal surface total HOAs in the PK, DALK, DSAEK, and control groups were 1.38 ± 0.67 μm, 1.19 ± 0.57 μm, 0.61 ± 0.33 μm, and 0.21 ± 0.07 μm, respectively. The anterior corneal HOAs in the DSAEK group were significantly less than those in the PK group (P.001) and DALK group (P.001). The mean posterior corneal surface total HOAs were, respectively, 0.20 ± 0.09 μm, 0.24 ± 0.11 μm, 0.27 ± 0.15 μm, and 0.07 ± 0.02 μm. There were no significant differences in the posterior corneal HOAs among the treatment groups.Because the refractive indices between the anterior and the posterior surfaces differed greatly, eyes that undergo DSAEK have lower anterior corneal HOAs compared with PK or DALK eyes. However, the anterior and posterior corneal HOAs in DSAEK eyes still were greater than those in control eyes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect