Evaluation of a new nomogram for Ferrara ring segment implantation in keratoconus

AIM: To evaluate the short-term clinical outcomes of Ferrara rings in keratoconus using an optimized nomogram developed after several years of research and retrospective analysis of clinical data. METHODS: This prospective longitudinal non-comparative clinical trial evaluated 88 eyes of 88 patients...

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Autores: Fernández, Joaquín, Peris Martínez, Cristina Paloma, Pérez Rueda, Antonio, Abdelkader, Sidi Mohamed Hamida, Roig Revert, María José, Piñero, David P.
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universidad Católica de Valencia San Vicente Mártir
Repositorio:RIUCV. Repositorio de la Universidad Católica de Valencia San Vicente Mártir
Idioma:inglés
OAI Identifier:oai:riucv.ucv.es:20.500.12466/4565
Acceso en línea:http://hdl.handle.net/20.500.12466/4565
Access Level:acceso abierto
Palabra clave:Intracorneal ring segment
Ferrara ring segment
Femtosecond
Keratoconus
Coma aberration
3201.09 Oftalmología
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spelling Evaluation of a new nomogram for Ferrara ring segment implantation in keratoconusFernández, JoaquínPeris Martínez, Cristina PalomaPérez Rueda, AntonioAbdelkader, Sidi Mohamed HamidaRoig Revert, María JoséPiñero, David P.Intracorneal ring segmentFerrara ring segmentFemtosecondKeratoconusComa aberration3201.09 OftalmologíaAIM: To evaluate the short-term clinical outcomes of Ferrara rings in keratoconus using an optimized nomogram developed after several years of research and retrospective analysis of clinical data. METHODS: This prospective longitudinal non-comparative clinical trial evaluated 88 eyes of 88 patients (age 18- 62y) with keratoconus diagnosis from two Spanish centers. Ferrara ring segment (AJL Ophthalmic) implantation was performed in all cases, using the mechanical procedure in 25 eyes (28.4%) and a femtosecond laser-assisted procedure in 63 eyes (71.6%). The ring segments implanted in each case were selected using a new optimized nomogram that considered variables such as anterior corneal asphericity and astigmatism or the discrepancy among astigmatism and coma orientations. Visual, refractive, corneal topographic, aberrometric, and pachymetric changes after surgery were evaluated during a 3-month follow-up. RESULTS: The implants induced a significant refractive change as well as an improvement in uncorrected (UDVA) and corrected distance visual acuity (CDVA; P<0.001). Postoperative CDVA of 0.10 logMAR or better was achieved in 28.4% and 46.5% of eyes, respectively. Two eyes (2.3%) lost two or more lines of CDVA whereas a total of 53.5% of eyes gained lines of CDVA. A significant central anterior and posterior corneal flattening was induced (P≤0.003), with a significant reduction of anterior (P<0.001) and posterior corneal astigmatisms (P=0.048), and a change in anterior asphericity (P<0.001). Total primary coma (6 mm pupil) change was also statistically significant (preoperative 3.66±3.04 µm vs postoperative 2.33±2.26 µm, P<0.001). No significant differences were found in the effect of ring segments between cases implanted using the mechanical and femtosecond techniques (P≥0.101). CONCLUSION: The implantation of Ferrara rings based on the nomogram evaluated is safe and effective for promoting a visual rehabilitation in keratoconus, with a relevant control of primary coma aberration20242024-09-2420212021-09-1820212021-09-18journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/20.500.12466/4565reponame:RIUCV. Repositorio de la Universidad Católica de Valencia San Vicente Mártirinstname:Universidad Católica de Valencia San Vicente MártirInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:riucv.ucv.es:20.500.12466/45652026-06-19T08:32:07Z
dc.title.none.fl_str_mv Evaluation of a new nomogram for Ferrara ring segment implantation in keratoconus
title Evaluation of a new nomogram for Ferrara ring segment implantation in keratoconus
spellingShingle Evaluation of a new nomogram for Ferrara ring segment implantation in keratoconus
Fernández, Joaquín
Intracorneal ring segment
Ferrara ring segment
Femtosecond
Keratoconus
Coma aberration
3201.09 Oftalmología
title_short Evaluation of a new nomogram for Ferrara ring segment implantation in keratoconus
title_full Evaluation of a new nomogram for Ferrara ring segment implantation in keratoconus
title_fullStr Evaluation of a new nomogram for Ferrara ring segment implantation in keratoconus
title_full_unstemmed Evaluation of a new nomogram for Ferrara ring segment implantation in keratoconus
title_sort Evaluation of a new nomogram for Ferrara ring segment implantation in keratoconus
dc.creator.none.fl_str_mv Fernández, Joaquín
Peris Martínez, Cristina Paloma
Pérez Rueda, Antonio
Abdelkader, Sidi Mohamed Hamida
Roig Revert, María José
Piñero, David P.
author Fernández, Joaquín
author_facet Fernández, Joaquín
Peris Martínez, Cristina Paloma
Pérez Rueda, Antonio
Abdelkader, Sidi Mohamed Hamida
Roig Revert, María José
Piñero, David P.
author_role author
author2 Peris Martínez, Cristina Paloma
Pérez Rueda, Antonio
Abdelkader, Sidi Mohamed Hamida
Roig Revert, María José
Piñero, David P.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Intracorneal ring segment
Ferrara ring segment
Femtosecond
Keratoconus
Coma aberration
3201.09 Oftalmología
topic Intracorneal ring segment
Ferrara ring segment
Femtosecond
Keratoconus
Coma aberration
3201.09 Oftalmología
description AIM: To evaluate the short-term clinical outcomes of Ferrara rings in keratoconus using an optimized nomogram developed after several years of research and retrospective analysis of clinical data. METHODS: This prospective longitudinal non-comparative clinical trial evaluated 88 eyes of 88 patients (age 18- 62y) with keratoconus diagnosis from two Spanish centers. Ferrara ring segment (AJL Ophthalmic) implantation was performed in all cases, using the mechanical procedure in 25 eyes (28.4%) and a femtosecond laser-assisted procedure in 63 eyes (71.6%). The ring segments implanted in each case were selected using a new optimized nomogram that considered variables such as anterior corneal asphericity and astigmatism or the discrepancy among astigmatism and coma orientations. Visual, refractive, corneal topographic, aberrometric, and pachymetric changes after surgery were evaluated during a 3-month follow-up. RESULTS: The implants induced a significant refractive change as well as an improvement in uncorrected (UDVA) and corrected distance visual acuity (CDVA; P<0.001). Postoperative CDVA of 0.10 logMAR or better was achieved in 28.4% and 46.5% of eyes, respectively. Two eyes (2.3%) lost two or more lines of CDVA whereas a total of 53.5% of eyes gained lines of CDVA. A significant central anterior and posterior corneal flattening was induced (P≤0.003), with a significant reduction of anterior (P<0.001) and posterior corneal astigmatisms (P=0.048), and a change in anterior asphericity (P<0.001). Total primary coma (6 mm pupil) change was also statistically significant (preoperative 3.66±3.04 µm vs postoperative 2.33±2.26 µm, P<0.001). No significant differences were found in the effect of ring segments between cases implanted using the mechanical and femtosecond techniques (P≥0.101). CONCLUSION: The implantation of Ferrara rings based on the nomogram evaluated is safe and effective for promoting a visual rehabilitation in keratoconus, with a relevant control of primary coma aberration
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-09-18
2021
2021-09-18
2024
2024-09-24
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12466/4565
url http://hdl.handle.net/20.500.12466/4565
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:RIUCV. Repositorio de la Universidad Católica de Valencia San Vicente Mártir
instname:Universidad Católica de Valencia San Vicente Mártir
instname_str Universidad Católica de Valencia San Vicente Mártir
reponame_str RIUCV. Repositorio de la Universidad Católica de Valencia San Vicente Mártir
collection RIUCV. Repositorio de la Universidad Católica de Valencia San Vicente Mártir
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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