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Eye surgery aftermath: new tool measures corneal strength changes

NCT ID NCT06818461

Knowledge-focused Sponsor: Beni-Suef University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jul 02, 2026 · Updated 4 times

Summary

This study measured how three common eye surgeries—LASIK, PRK, and corneal cross-linking (CXL)—change the stiffness of the cornea. Using a device called Corvis ST, researchers assessed 150 adults who had undergone one of these procedures at least a month earlier. The goal was to better understand how these surgeries affect corneal biomechanics, which could help improve surgical safety and outcomes.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this could help doctors better predict and prevent complications like corneal weakening after refractive surgery.
What could go wrong
This is a small, completed observational study, not a treatment trial. The findings may not apply to all patients or change current practice.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

150 people

The number who actually took part.

Started

Jan 2025

Finished

Oct 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

patients coming for refractive surgery

Ages

18 to 60 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: \- 1. Adults aged 18-60 years. 2. Patients who have undergone LASIK, PRK, or CXL at least 1 month prior to measure-ment. 3\. Stable refraction for at least 3 months post-procedure. 4. No evidence of active ocular disease or infection. Exclusion Criteria: * 1\. History of other ocular surgeries (excluding LASIK, PRK, or CXL). 2. Presence of keratoconus or other corneal ectatic disorders not treated with CXL. 3\. Systemic or ocular conditions affecting corneal biomechanical properties (e.g., dia-betes, connective tissue disorders). 4\. Current or recent use of medications influencing corneal biomechanics.

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Conditions

The condition(s) this trial relates to.

keratoconus myopia

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Keratoconus Myopia Refractive surgery

Contacts and locations

Locations

  • Clearvision

    Mohandessin, Giza Governorate, 11344, Egypt

More trials for these conditions

Other studies related to the condition(s) this trial covers.