ArticleClinical ophthalmology (Auckland, N.Z.)2026
Clinical and Tomographic Outcomes of Long Arc-Length Intrastromal Corneal Ring Segment Implantation in Central Keratoconus.
Article in Clinical ophthalmology (Auckland, N.Z.), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Purpose: To assess the outcomes of implanting a long arc-length intrastromal corneal ring segment (ICRS) in central hyperprolate keratoconus (KC). Methods: Retrospective study enrolling patients with moderate to advanced hyperprolate KC that were submitted to long arc-length ICRS implantation (Ferrara™ or Keraring®). The clinical measurements taken included manifest refraction, spectacle corrected distance visual acuity (CDVA, logMAR scale), and corneal tomographic analysis (Oculus Pentacam HR (OCULUS Optikgerate GmbH, Wetzlar, Germany). Clinical and tomographic changes were assessed. All examinations were performed before and after surgery. Results: Thirty-five eyes of 31 patients (71.0% men, n=22) with a mean±SD age of 28.25±11.42 years were enrolled. Median (IQR) follow-up was 19.3 (9.93-23.03) months. Twenty-five Keraring® and ten Ferrara™ ICRS, including 16 (45.7%) with progressive thickness, were successfully implanted, with no intraoperative or postoperative complications. CDVA improved from 0.70±0.40 to 0.38±0.32 logMAR (p < 0.001) and the spherical equivalent decreased from -1.94±2.81 to -0.16±1.93D (p < 0.001). Overall, 82.8% gained at least one line; no patient lost lines postoperatively. All anterior but not posterior keratometric parameters decreased significantly. Maximum elevation of both corneal surfaces, asphericity, vertical Coma-like aberration and the total higher-order aberrations decreased significantly with the procedure (all p < 0.05). The 6-month safety index (ratio of postoperative to preoperative CDVA) was 2.85. No complications occurred during or after the procedure. Conclusions: These results suggest that implanting a long arc-length ICRS is a well-tolerated and effective procedure associated to improvement of visual and tomographic outcomes in patients with central hyperprolate keratoconus.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.