Long-term results of intrastromal ring implantation for keratoconus
ABSTRACT Objective: To evaluate refractive and topographic outcomes before and at least 7 years after intrastromal ring segment implantation surgery in patients with keratoconus. Methods: Long-term retrospective longitudinal study carried out with 35 patients (62 eyes) aged 10 to 30 who underwent...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Sociedade Brasileira de Oftalmologia
2025-08-01
|
| Series: | Revista Brasileira de Oftalmologia |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-72802025000100226&lng=en&tlng=en |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849339093398323200 |
|---|---|
| author | Henrique Celso Duarte de Rezende Rocha Bernardo Kaplan Moscovici Daniel Diniz da Gama Renato Ambrósio Júnior Marcos Pereira de Ávila |
| author_facet | Henrique Celso Duarte de Rezende Rocha Bernardo Kaplan Moscovici Daniel Diniz da Gama Renato Ambrósio Júnior Marcos Pereira de Ávila |
| author_sort | Henrique Celso Duarte de Rezende Rocha |
| collection | DOAJ |
| description | ABSTRACT Objective: To evaluate refractive and topographic outcomes before and at least 7 years after intrastromal ring segment implantation surgery in patients with keratoconus. Methods: Long-term retrospective longitudinal study carried out with 35 patients (62 eyes) aged 10 to 30 who underwent intrastromal ring segment implantation using a manual technique. Different arc rings were analyzed across various keratoconus types. Results: Significant improvements in topographic astigmatism (p = 0.001) and corrected distance visual acuity (p < 0.001) were observed, with no significant changes in keratometry (p = 0.099) and a slight decrease in pachymetry (p = 0.033). Statistically significant improvements in K1 were noted with two 160° arc rings. K2 showed improvements with all arc rings except for one 210° ring. Topographic astigmatism improved notably with two 160° arc rings. No significant changes occurred between six months after surgery and final visits. Conclusion: Long-term follow-up demonstrated favorable outcomes post-intrastromal ring segment implantation, particularly in manifest refraction and corrected distance visual acuity. Vision gain was common, though endothelial cell counts decreased, especially with two-ring segments. Thicker rings reduced astigmatism more significantly, whereas two-ring segments reduced keratometry. Notably, 210° arc rings did not reduce topographic astigmatism but did decrease refractive astigmatism. |
| format | Article |
| id | doaj-art-e26351e6e97b47e0970a1e226a1fe039 |
| institution | Kabale University |
| issn | 1982-8551 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Sociedade Brasileira de Oftalmologia |
| record_format | Article |
| series | Revista Brasileira de Oftalmologia |
| spelling | doaj-art-e26351e6e97b47e0970a1e226a1fe0392025-08-20T03:44:13ZengSociedade Brasileira de OftalmologiaRevista Brasileira de Oftalmologia1982-85512025-08-018410.37039/1982.8551.20250053Long-term results of intrastromal ring implantation for keratoconusHenrique Celso Duarte de Rezende Rochahttps://orcid.org/0009-0000-8644-9009Bernardo Kaplan Moscovicihttps://orcid.org/0000-0003-4441-4304Daniel Diniz da Gamahttps://orcid.org/0000-0003-0499-4332Renato Ambrósio Júniorhttps://orcid.org/0000-0001-6919-4606Marcos Pereira de Ávilahttps://orcid.org/0000-0003-2694-3747ABSTRACT Objective: To evaluate refractive and topographic outcomes before and at least 7 years after intrastromal ring segment implantation surgery in patients with keratoconus. Methods: Long-term retrospective longitudinal study carried out with 35 patients (62 eyes) aged 10 to 30 who underwent intrastromal ring segment implantation using a manual technique. Different arc rings were analyzed across various keratoconus types. Results: Significant improvements in topographic astigmatism (p = 0.001) and corrected distance visual acuity (p < 0.001) were observed, with no significant changes in keratometry (p = 0.099) and a slight decrease in pachymetry (p = 0.033). Statistically significant improvements in K1 were noted with two 160° arc rings. K2 showed improvements with all arc rings except for one 210° ring. Topographic astigmatism improved notably with two 160° arc rings. No significant changes occurred between six months after surgery and final visits. Conclusion: Long-term follow-up demonstrated favorable outcomes post-intrastromal ring segment implantation, particularly in manifest refraction and corrected distance visual acuity. Vision gain was common, though endothelial cell counts decreased, especially with two-ring segments. Thicker rings reduced astigmatism more significantly, whereas two-ring segments reduced keratometry. Notably, 210° arc rings did not reduce topographic astigmatism but did decrease refractive astigmatism.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-72802025000100226&lng=en&tlng=enKeratoconusIntrastromal ringCorneal surgeryVisual acuityEndothelial cells |
| spellingShingle | Henrique Celso Duarte de Rezende Rocha Bernardo Kaplan Moscovici Daniel Diniz da Gama Renato Ambrósio Júnior Marcos Pereira de Ávila Long-term results of intrastromal ring implantation for keratoconus Revista Brasileira de Oftalmologia Keratoconus Intrastromal ring Corneal surgery Visual acuity Endothelial cells |
| title | Long-term results of intrastromal ring implantation for keratoconus |
| title_full | Long-term results of intrastromal ring implantation for keratoconus |
| title_fullStr | Long-term results of intrastromal ring implantation for keratoconus |
| title_full_unstemmed | Long-term results of intrastromal ring implantation for keratoconus |
| title_short | Long-term results of intrastromal ring implantation for keratoconus |
| title_sort | long term results of intrastromal ring implantation for keratoconus |
| topic | Keratoconus Intrastromal ring Corneal surgery Visual acuity Endothelial cells |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-72802025000100226&lng=en&tlng=en |
| work_keys_str_mv | AT henriquecelsoduartederezenderocha longtermresultsofintrastromalringimplantationforkeratoconus AT bernardokaplanmoscovici longtermresultsofintrastromalringimplantationforkeratoconus AT danieldinizdagama longtermresultsofintrastromalringimplantationforkeratoconus AT renatoambrosiojunior longtermresultsofintrastromalringimplantationforkeratoconus AT marcospereiradeavila longtermresultsofintrastromalringimplantationforkeratoconus |