Evidence map›Paper›PMID 40357455›Full record

ReviewClinical ophthalmology (Auckland, N.Z.)2025

Efficacy and Safety of Epi-On vs Epi-Off Corneal Cross-Linking in Corneal Ectasia: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.

Reem O Nughays, Abdullah S Bazayd, Lujain A Alshamekh, Reemas A Alshammari, Mohammed A Alenezi, Hashem Y Dahlan, Jana A Alsubhi, Sara G Alshammri, Nouf A AlQurashi, Abdulaziz H Aldajani and 5 more

Abstract readReview
In one paragraph

Review in Clinical ophthalmology (Auckland, N.Z.), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

6 citing papers in PubMed.

  1. Review
  2. Article
  3. Transepithelial corneal cross-linking: a review.International ophthalmology · 2026
    Review
  4. Article
  5. Article
  6. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

15 authors.

Reem O NughaysCollege of Medicine, King Saud bin Abdulaziz for Health Sciences, Jeddah, Saudi Arabia.
Abdullah S BazaydCollege of Medicine, King Saud bin Abdulaziz for Health Sciences, Jeddah, Saudi Arabia.
Lujain A AlshamekhCollege of Medicine, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia.ORCID 0009-0001-1586-0121
Reemas A AlshammariCollege of Medicine, Imam Mohammed bin Saud Islamic University, Riyadh, Saudi Arabia.
Mohammed A AleneziCollege of Medicine, Northern Border University, Arar, Saudi Arabia.
Hashem Y DahlanCollege of Medicine, Umm-Al Qura University, Makkah, Saudi Arabia.
Jana A AlsubhiCollege of Medicine, University of Jeddah, Jeddah, Saudi Arabia.
Sara G AlshammriCollege of Medicine, Vision College, Riyadh, Saudi Arabia.
Nouf A AlQurashiCollege of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia.
Abdulaziz H AldajaniCollege of Medicine, King Faisal University, Al-Hasa, Saudi Arabia.
Abdulrahman H AlrammahCollege of Medicine, King Faisal University, Al-Hasa, Saudi Arabia.ORCID 0009-0003-4615-7011
Mariam N AleneziGeneral Surgery Department, Farwaniya Hospital, Farwaniya, Kuwait.ORCID 0009-0003-8071-5937
Areej Abdullah AlmutairiCollege of Medicine, Taif University, Taif, Saudi Arabia.
Abdulaziz F AlomayriCollege of Medicine, King Saud University, Riyadh, Saudi Arabia.
Saeed AlghamdiOphthalmology Department, King Abdulaziz Medical City, Jeddah, Saudi Arabia.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Corneal ectasias are progressive conditions that impair vision and quality of life. Corneal collagen cross-linking (CXL) aims to halt disease progression by strengthening the cornea. This review compares two CXL methods, epithelium-on (epi-on) and epithelium-off (epi-off), to assess their safety and effectiveness for managing corneal ectasia. A systematic search up to July 2024 of PubMed, Medline, Web of Science, Cochrane Central, Google Scholar, and Scopus identified 13 randomized controlled trials (RCTs) involving 872 patients and 1041 eyes. Data were analyzed following PRISMA guidelines using fixed-effects and random-effects models. The primary outcome was the change in maximal keratometry (Kmax) at 12 months, with secondary outcomes including safety profile, best-corrected visual acuity (BCVA), uncorrected visual acuity (UCVA), spherical equivalent (SE), and endothelial cell count (ECC). The findings revealed no statistically significant differences between epithelium-on (epi-on) and epithelium-off (epi-off) CXL in Kmax, BCVA, UCVA, SE, or corneal curvature parameters. However, epithelium-off (epi-off) CXL was associated with less endothelial cell loss and higher rates of side effects, including corneal haze and postoperative discomfort. The choice of treatment should be tailored to individual patient needs, balancing clinical goals and safety considerations. This review highlights the need for further studies to optimize CXL approaches and improve outcomes while minimizing complications.

Indexed as

corneal collagen cross-linking (CXL)corneal ectasiaendothelial cell count (ECC)epi-offepi-onkeratoconusmaximal keratometry (Kmax)visual acuity

Identifiers

PMID40357455
PMCPMC12068400

What OpenQuestion holds

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Registered trials

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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.