| Título: | Optical tolerance to rotation of trifocal toric intraocular lenses as a function of the cylinder power |
| Autores: | Ruiz Alcocer, Javier ; Lorente Velázquez, Amalia ; Gracia, Pablo, de |
| Tipo de documento: | texto impreso |
| Editorial: | SAGE Publishing, 2020-05-27 |
| Dimensiones: | application/pdf |
| Nota general: | info:eu-repo/semantics/openAccess |
| Idiomas: | |
| Palabras clave: | Estado = Publicado , Materia = Ciencias Biomédicas: Medicina: Cirugía , Materia = Ciencias Biomédicas: Óptica y optometría: Optometría , Materia = Ciencias Biomédicas: Óptica y optometría: Óptica oftálmica , Tipo = Artículo |
| Resumen: |
Background: The aim was to assess the impact of 5- and 10-degree rotations in the optical quality of a trifocal toric intraocular lens with different amounts of cylinder. Methods: Two Physiol Toric intraocular lenses with 1.5 and 3.0 D of cylinder were analysed in three different positions: centred, 5 and 10 degrees rotated. The optical quality of the intraocular lenses was evaluated with the PMTF optical bench through specific perpendicular targets. The analysis was performed by the through-focus modulation transfer function curves and the modulation transfer function corresponding to distance vision (0 D of vergence). Results: For a centred situation, the through-focus modulation transfer function curves of both intraocular lenses showed the classical three peaks corresponding to the powers of the two principal meridians of the intraocular lenses. When 5 and 10 degrees of rotation were induced, the three peaks were attenuated in both cases. The case with the intraocular lens with 3.0 D of cylinder and 10 degrees of rotation showed the worst optical quality and a significant loss of trifocality. The modulation transfer function values obtained for distance vision also showed the worst optical quality for the intraocular lens with 3.0 D of cylinder and 10 degrees of rotation. Conclusion: Rotations over 5 degrees decreased the optical quality of trifocal toric intraocular lenses, being this reduction moderate from 5 to 10 degrees for low levels of cylinder (?1.5 D). For mid-high levels of cylinder (?3.0 D), rotations over 5 degrees cause a significant loss of optical quality at all object distances. |
| En línea: | https://eprints.ucm.es/id/eprint/60972/1/JavierRAlcocer_2020_EJO-20-0297.R1_Proof_hi.pdf |
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