Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/60726
COMPARTIR / EXPORTAR:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Invitar a revisión por pares abierta
Título

Optical aberrations with aspheric intraocular lenses

AutorMarcos, Susana CSIC ORCID ; Barbero, Sergio CSIC ORCID; Llorente, Lourdes CSIC; Dorronsoro, Carlos CSIC ORCID; Rosales, Patricia CSIC; Jiménez-Alfaro, Ignacio CSIC
Fecha de publicación2003
EditorAssociation for Research in Vision and Ophthalmology
CitaciónJournal of Vision 3(12): 39a (2003)
ResumenPurpose: In a cataract procedure the crystalline lens is replaced by an Intraocular Lens (IOL), modifying the corneal (by the incision) and the internal aberration pattern (by the IOL). We studied ocular optical quality in patients with aspheric (Tecnis, Pharmacia) IOLs. We measured the change of corneal aberrations with cataract surgery and the aberrations of the aspheric IOLs in vivo. Methods: Corneal and total aberrations were measured on 10 eyes before and after phacoemulsification with aspheric IOL implantation. Corneal aberrations were measured using corneal elevation from corneal topography and custom software. Total aberrations were measured with a 2nd-generation custom-made laser ray tracing (LRT). Sampling pupil diameters ranged from 4.5 to 6-mm, centered at the natural pupil. Decentration of the IOL was assessed from images captured by the back-illumination channel of the LRT system. Results: 1) The mean corneal spherical aberration (S.A) after surgery was 0.12±0.15 microns, the mean internal S.A. was -0.18± 0.19 microns, and mean post-operative total S.A. was -0.01±0.05 microns. Unlike spherical IOLs (with positive S.A)1, aspheric IOLs tend to balance the corneal S.A., producing total S.A. closer to a younger eye. 2) Third-order aberrations (0.33±0.17 microns) are higher than those reported for younger eyes. Vertical coma is highly correlated with vertical decentrations. 3) Corneal aberrations increase significantly after surgery, particularly astigmatism and trefoil. This increase must be associated with the incision and the implantation procedure. Conclusions: Aspheric IOLs are effective at compensating corneal spherical aberration. However, optical quality with aspheric IOLs is lower than in young eyes (mainly due to third order aberrations caused by IOL tilt and decentration, and increased corneal aberrations). On average, 3rd order and higher aberrations are lower with aspheric than with spherical IOLs, but overall image quality (including astigmatism) is not significantly different between both type of lenses.
URIhttp://hdl.handle.net/10261/60726
DOI10.1167/3.12.39
Identificadoresdoi: 10.1167/3.12.39
issn: 1534-7362
Aparece en las colecciones: (CFMAC-IO) Artículos




Ficheros en este ítem:
Fichero Descripción Tamaño Formato
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo

CORE Recommender

Page view(s)

341
checked on 28-mar-2024

Download(s)

99
checked on 28-mar-2024

Google ScholarTM

Check

Altmetric

Altmetric


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.