Publication
Outcome analysis of intracorneal ring segments for the treatment of keratoconus based on visual, refractive, and aberrometric impairment
| dc.contributor.author | Vega-Estrada, A | |
| dc.contributor.author | Alio, JL | |
| dc.contributor.author | Brenner, LF | |
| dc.contributor.author | Javaloy, J | |
| dc.contributor.author | Plaza Puche, AB | |
| dc.contributor.author | Barraquer, Rafael I | |
| dc.contributor.author | Teus, MA | |
| dc.contributor.author | Murta, JN | |
| dc.contributor.author | Henriques, JG | |
| dc.contributor.author | Uceda-Montanes, A | |
| dc.date.accessioned | 2016-05-12T10:05:56Z | |
| dc.date.available | 2016-05-12T10:05:56Z | |
| dc.date.issued | 2013-03 | |
| dc.description.abstract | PURPOSE: To analyze the outcomes of intracorneal ring segment (ICRS) implantation for the treatment of keratoconus based on preoperative visual impairment. DESIGN: Multicenter, retrospective, nonrandomized study. METHODS: A total of 611 eyes of 361 keratoconic patients were evaluated. Subjects were classified according to their preoperative corrected distance visual acuity (CDVA) into 5 different groups: grade I, CDVA of 0.90 or better; grade II, CDVA equal to or better than 0.60 and worse than 0.90; grade III, CDVA equal to or better than 0.40 and worse than 0.60; grade IV, CDVA equal to or better than 0.20 and worse than 0.40; and grade plus, CDVA worse than 0.20. Success and failure indices were defined based on visual, refractive, corneal topographic, and aberrometric data and evaluated in each group 6 months after ICRS implantation. RESULTS: Significant improvement after the procedure was observed regarding uncorrected distance visual acuity in all grades (P < .05). CDVA significantly decreased in grade I (P < .01) but significantly increased in all other grades (P < .05). A total of 37.9% of patients with preoperative CDVA 0.6 or better gained 1 or more lines of CDVA, whereas 82.8% of patients with preoperative CDVA 0.4 or worse gained 1 or more lines of CDVA (P < .01). Spherical equivalent and keratometry readings showed a significant reduction in all grades (P ≤ .02). Corneal higher-order aberrations did not change after the procedure (P ≥ .05). CONCLUSIONS: Based on preoperative visual impairment, ICRS implantation provides significantly better results in patients with a severe form of the disease. A notable loss of CDVA lines can be expected in patients with a milder form of keratoconus. | pt_PT |
| dc.identifier.citation | Am J Ophthalmol. 2013 Mar;155(3):575-584. | pt_PT |
| dc.identifier.doi | 10.1016/j.ajo.2012.08.020 | pt_PT |
| dc.identifier.uri | http://hdl.handle.net/10400.4/1920 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.subject | Estroma da Córnea | pt_PT |
| dc.subject | Queratocono | pt_PT |
| dc.subject | Próteses e Implantes | pt_PT |
| dc.subject | Acuidade Visual | pt_PT |
| dc.subject | Refraçcão Ocular | pt_PT |
| dc.subject | Implante de Prótese | pt_PT |
| dc.title | Outcome analysis of intracorneal ring segments for the treatment of keratoconus based on visual, refractive, and aberrometric impairment | pt_PT |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | article | pt_PT |