Positional accommodative intraocular lens power error induced by the estimation of the corneal power and the effective lens position

PURPOSE: To evaluate the predictability of the refractive correction achieved with a positional accommodating intraocular lenses (IOL) and to develop a potential optimization of it by minimizing the error associated with the keratometric estimation of the corneal power and by developing a predictive...

Descripción completa

Detalles Bibliográficos
Autores principales: Piñero, David P, Camps, Vicente J, Ramón, María L, Mateo, Verónica, Pérez-Cambrodí, Rafael J
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medknow Publications & Media Pvt Ltd 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4501142/
https://www.ncbi.nlm.nih.gov/pubmed/26139807
http://dx.doi.org/10.4103/0301-4738.159882
_version_ 1782381019832254464
author Piñero, David P
Camps, Vicente J
Ramón, María L
Mateo, Verónica
Pérez-Cambrodí, Rafael J
author_facet Piñero, David P
Camps, Vicente J
Ramón, María L
Mateo, Verónica
Pérez-Cambrodí, Rafael J
author_sort Piñero, David P
collection PubMed
description PURPOSE: To evaluate the predictability of the refractive correction achieved with a positional accommodating intraocular lenses (IOL) and to develop a potential optimization of it by minimizing the error associated with the keratometric estimation of the corneal power and by developing a predictive formula for the effective lens position (ELP). MATERIALS AND METHODS: Clinical data from 25 eyes of 14 patients (age range, 52–77 years) and undergoing cataract surgery with implantation of the accommodating IOL Crystalens HD (Bausch and Lomb) were retrospectively reviewed. In all cases, the calculation of an adjusted IOL power (P(IOLadj)) based on Gaussian optics considering the residual refractive error was done using a variable keratometric index value (n(kadj)) for corneal power estimation with and without using an estimation algorithm for ELP obtained by multiple regression analysis (ELP(adj)). P(IOLadj) was compared to the real IOL power implanted (P(IOLReal), calculated with the SRK-T formula) and also to the values estimated by the Haigis, HofferQ, and Holladay I formulas. RESULTS: No statistically significant differences were found between P(IOLReal) and P(IOLadj) when ELP(adj) was used (P = 0.10), with a range of agreement between calculations of 1.23 D. In contrast, P(IOLReal) was significantly higher when compared to P(IOLadj) without using ELP(adj) and also compared to the values estimated by the other formulas. CONCLUSIONS: Predictable refractive outcomes can be obtained with the accommodating IOL Crystalens HD using a variable keratometric index for corneal power estimation and by estimating ELP with an algorithm dependent on anatomical factors and age.
format Online
Article
Text
id pubmed-4501142
institution National Center for Biotechnology Information
language English
publishDate 2015
publisher Medknow Publications & Media Pvt Ltd
record_format MEDLINE/PubMed
spelling pubmed-45011422015-07-15 Positional accommodative intraocular lens power error induced by the estimation of the corneal power and the effective lens position Piñero, David P Camps, Vicente J Ramón, María L Mateo, Verónica Pérez-Cambrodí, Rafael J Indian J Ophthalmol Original Article PURPOSE: To evaluate the predictability of the refractive correction achieved with a positional accommodating intraocular lenses (IOL) and to develop a potential optimization of it by minimizing the error associated with the keratometric estimation of the corneal power and by developing a predictive formula for the effective lens position (ELP). MATERIALS AND METHODS: Clinical data from 25 eyes of 14 patients (age range, 52–77 years) and undergoing cataract surgery with implantation of the accommodating IOL Crystalens HD (Bausch and Lomb) were retrospectively reviewed. In all cases, the calculation of an adjusted IOL power (P(IOLadj)) based on Gaussian optics considering the residual refractive error was done using a variable keratometric index value (n(kadj)) for corneal power estimation with and without using an estimation algorithm for ELP obtained by multiple regression analysis (ELP(adj)). P(IOLadj) was compared to the real IOL power implanted (P(IOLReal), calculated with the SRK-T formula) and also to the values estimated by the Haigis, HofferQ, and Holladay I formulas. RESULTS: No statistically significant differences were found between P(IOLReal) and P(IOLadj) when ELP(adj) was used (P = 0.10), with a range of agreement between calculations of 1.23 D. In contrast, P(IOLReal) was significantly higher when compared to P(IOLadj) without using ELP(adj) and also compared to the values estimated by the other formulas. CONCLUSIONS: Predictable refractive outcomes can be obtained with the accommodating IOL Crystalens HD using a variable keratometric index for corneal power estimation and by estimating ELP with an algorithm dependent on anatomical factors and age. Medknow Publications & Media Pvt Ltd 2015-05 /pmc/articles/PMC4501142/ /pubmed/26139807 http://dx.doi.org/10.4103/0301-4738.159882 Text en Copyright: © Indian Journal of Ophthalmology http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Piñero, David P
Camps, Vicente J
Ramón, María L
Mateo, Verónica
Pérez-Cambrodí, Rafael J
Positional accommodative intraocular lens power error induced by the estimation of the corneal power and the effective lens position
title Positional accommodative intraocular lens power error induced by the estimation of the corneal power and the effective lens position
title_full Positional accommodative intraocular lens power error induced by the estimation of the corneal power and the effective lens position
title_fullStr Positional accommodative intraocular lens power error induced by the estimation of the corneal power and the effective lens position
title_full_unstemmed Positional accommodative intraocular lens power error induced by the estimation of the corneal power and the effective lens position
title_short Positional accommodative intraocular lens power error induced by the estimation of the corneal power and the effective lens position
title_sort positional accommodative intraocular lens power error induced by the estimation of the corneal power and the effective lens position
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4501142/
https://www.ncbi.nlm.nih.gov/pubmed/26139807
http://dx.doi.org/10.4103/0301-4738.159882
work_keys_str_mv AT pinerodavidp positionalaccommodativeintraocularlenspowererrorinducedbytheestimationofthecornealpowerandtheeffectivelensposition
AT campsvicentej positionalaccommodativeintraocularlenspowererrorinducedbytheestimationofthecornealpowerandtheeffectivelensposition
AT ramonmarial positionalaccommodativeintraocularlenspowererrorinducedbytheestimationofthecornealpowerandtheeffectivelensposition
AT mateoveronica positionalaccommodativeintraocularlenspowererrorinducedbytheestimationofthecornealpowerandtheeffectivelensposition
AT perezcambrodirafaelj positionalaccommodativeintraocularlenspowererrorinducedbytheestimationofthecornealpowerandtheeffectivelensposition