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New study to check if laser eye surgery skews eye pressure readings

NCT ID NCT07549815

Knowledge-focused Sponsor: Tanta 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 This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study will measure how eye pressure changes after common laser vision correction surgeries like PRK, LASIK, and femtosecond laser. Researchers will compare two measurement methods—Corvis CT and the standard applanation tonometer—in 50 people aged 19 to 35 with mild to moderate nearsightedness. The goal is to see if these surgeries affect the accuracy of eye pressure readings, which is important for detecting glaucoma later on.

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 study could help doctors more accurately measure eye pressure after laser vision correction, improving glaucoma screening in these patients.
What could go wrong
This is a small, early observational study with only 50 participants. It does not test a treatment, so it will not directly change patient care. Results may not apply to all types of refractive surgery or patient populations.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 50 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Apr 2026

An estimate. Start dates often move.

Expected to finish

Jan 2027

An estimate. End dates often move.

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.

Ages

19 to 35 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * Age between 19 and 35 years old * Myopia range from (-2.00 to -6.00 Diopter) . Exclusion Criteria: * Kertoconus. * Corneal scarring. * Previous corneal infections. * Minimum corneal thickness at the thinnest location less than 400 µm. * History of uveitis or ocular allergy. * Pre-existing glaucoma.

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Conditions

The condition(s) this trial relates to.

myopia ocular hypertension

As listed by the trial registrant

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

Intraocular pressure Refractive surgery

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Tanta Univeristy Hospital

    Tanta, 31515, Egypt

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