Long-Term Follow-Up of Intrastromal Corneal Ring Segments in Paracentral Keratoconus with Coincident Corneal Keratometric, Comatic, and Refractive Axes: Stability of the Procedure
Purpose. To assess the long-term outcomes of implanting intrastromal corneal ring segments (ICRS) in paracentral keratoconic eyes. Methods. 58 eyes with paracentral keratoconus with coincident refractive, keratometric, and comatic axes were evaluated. Uncorrected (UDVA) and corrected (CDVA) distance...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2017-01-01
|
| Series: | Journal of Ophthalmology |
| Online Access: | http://dx.doi.org/10.1155/2017/4058026 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832550715897151488 |
|---|---|
| author | Luis Fernández-Vega Cueto Carlos Lisa David Madrid-Costa Jesús Merayo-Lloves José F. Alfonso |
| author_facet | Luis Fernández-Vega Cueto Carlos Lisa David Madrid-Costa Jesús Merayo-Lloves José F. Alfonso |
| author_sort | Luis Fernández-Vega Cueto |
| collection | DOAJ |
| description | Purpose. To assess the long-term outcomes of implanting intrastromal corneal ring segments (ICRS) in paracentral keratoconic eyes. Methods. 58 eyes with paracentral keratoconus with coincident refractive, keratometric, and comatic axes were evaluated. Uncorrected (UDVA) and corrected (CDVA) distance visual acuity and refractive errors were recorded before and at all follow-up visits. The postoperative follow-up was 5 years. Patients were divided into two groups: group I (30 years old or younger) and group II (more than 30 years old). Results. The mean UDVA (logMAR) rose from a preoperative 0.83 ± 0.31 to a five-year postoperative 0.42 ± 0.33 (P<0.0001). The mean CDVA varied from 0.16 ± 0.17 to 0.11 ± 0.18 (P=0.0003). Both the UDVA and CDVA were stable over the postoperative period in both groups (P>0.05). The spherical equivalent and the refractive cylinder declined steeply after ICRS implantation in both groups (P<0.001), and were stable over the postoperative period (P>0.05). The keratometric values were also stable over the postoperative follow-up. Conclusion. Ferrara-type ICRS implantation in keratoconus that meets the characteristics of the sample under study reduces the refractive error at the same time as it improves postoperative UDVA and CDVA six months after surgery and that these results remain stable over five years of follow-up. |
| format | Article |
| id | doaj-art-a5688f18ea3f488c97978d01f7f9c2b2 |
| institution | Kabale University |
| issn | 2090-004X 2090-0058 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Ophthalmology |
| spelling | doaj-art-a5688f18ea3f488c97978d01f7f9c2b22025-02-03T06:06:08ZengWileyJournal of Ophthalmology2090-004X2090-00582017-01-01201710.1155/2017/40580264058026Long-Term Follow-Up of Intrastromal Corneal Ring Segments in Paracentral Keratoconus with Coincident Corneal Keratometric, Comatic, and Refractive Axes: Stability of the ProcedureLuis Fernández-Vega Cueto0Carlos Lisa1David Madrid-Costa2Jesús Merayo-Lloves3José F. Alfonso4Fernández-Vega Ophthalmological Institute, Oviedo, SpainFernández-Vega Ophthalmological Institute, Oviedo, SpainOptics II Department, Optics and Optometry Faculty, Complutense University of Madrid, Madrid, SpainFernández-Vega Ophthalmological Institute, Oviedo, SpainFernández-Vega Ophthalmological Institute, Oviedo, SpainPurpose. To assess the long-term outcomes of implanting intrastromal corneal ring segments (ICRS) in paracentral keratoconic eyes. Methods. 58 eyes with paracentral keratoconus with coincident refractive, keratometric, and comatic axes were evaluated. Uncorrected (UDVA) and corrected (CDVA) distance visual acuity and refractive errors were recorded before and at all follow-up visits. The postoperative follow-up was 5 years. Patients were divided into two groups: group I (30 years old or younger) and group II (more than 30 years old). Results. The mean UDVA (logMAR) rose from a preoperative 0.83 ± 0.31 to a five-year postoperative 0.42 ± 0.33 (P<0.0001). The mean CDVA varied from 0.16 ± 0.17 to 0.11 ± 0.18 (P=0.0003). Both the UDVA and CDVA were stable over the postoperative period in both groups (P>0.05). The spherical equivalent and the refractive cylinder declined steeply after ICRS implantation in both groups (P<0.001), and were stable over the postoperative period (P>0.05). The keratometric values were also stable over the postoperative follow-up. Conclusion. Ferrara-type ICRS implantation in keratoconus that meets the characteristics of the sample under study reduces the refractive error at the same time as it improves postoperative UDVA and CDVA six months after surgery and that these results remain stable over five years of follow-up.http://dx.doi.org/10.1155/2017/4058026 |
| spellingShingle | Luis Fernández-Vega Cueto Carlos Lisa David Madrid-Costa Jesús Merayo-Lloves José F. Alfonso Long-Term Follow-Up of Intrastromal Corneal Ring Segments in Paracentral Keratoconus with Coincident Corneal Keratometric, Comatic, and Refractive Axes: Stability of the Procedure Journal of Ophthalmology |
| title | Long-Term Follow-Up of Intrastromal Corneal Ring Segments in Paracentral Keratoconus with Coincident Corneal Keratometric, Comatic, and Refractive Axes: Stability of the Procedure |
| title_full | Long-Term Follow-Up of Intrastromal Corneal Ring Segments in Paracentral Keratoconus with Coincident Corneal Keratometric, Comatic, and Refractive Axes: Stability of the Procedure |
| title_fullStr | Long-Term Follow-Up of Intrastromal Corneal Ring Segments in Paracentral Keratoconus with Coincident Corneal Keratometric, Comatic, and Refractive Axes: Stability of the Procedure |
| title_full_unstemmed | Long-Term Follow-Up of Intrastromal Corneal Ring Segments in Paracentral Keratoconus with Coincident Corneal Keratometric, Comatic, and Refractive Axes: Stability of the Procedure |
| title_short | Long-Term Follow-Up of Intrastromal Corneal Ring Segments in Paracentral Keratoconus with Coincident Corneal Keratometric, Comatic, and Refractive Axes: Stability of the Procedure |
| title_sort | long term follow up of intrastromal corneal ring segments in paracentral keratoconus with coincident corneal keratometric comatic and refractive axes stability of the procedure |
| url | http://dx.doi.org/10.1155/2017/4058026 |
| work_keys_str_mv | AT luisfernandezvegacueto longtermfollowupofintrastromalcornealringsegmentsinparacentralkeratoconuswithcoincidentcornealkeratometriccomaticandrefractiveaxesstabilityoftheprocedure AT carloslisa longtermfollowupofintrastromalcornealringsegmentsinparacentralkeratoconuswithcoincidentcornealkeratometriccomaticandrefractiveaxesstabilityoftheprocedure AT davidmadridcosta longtermfollowupofintrastromalcornealringsegmentsinparacentralkeratoconuswithcoincidentcornealkeratometriccomaticandrefractiveaxesstabilityoftheprocedure AT jesusmerayolloves longtermfollowupofintrastromalcornealringsegmentsinparacentralkeratoconuswithcoincidentcornealkeratometriccomaticandrefractiveaxesstabilityoftheprocedure AT josefalfonso longtermfollowupofintrastromalcornealringsegmentsinparacentralkeratoconuswithcoincidentcornealkeratometriccomaticandrefractiveaxesstabilityoftheprocedure |