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New study aims to sharpen vision after laser eye surgery

NCT ID NCT07518316

Knowledge-focused Sponsor: Tianjin Eye Hospital 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study will measure how pupil size and eye shape affect visual quality in 300 people with normal eyes or after refractive surgery. Researchers will use questionnaires and special instruments to track symptoms and eye measurements. The goal is to better understand what influences how well people see after surgery.

What this could mean

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

Active substance
Corneal Refractive Surgery
What this could lead to
If successful, this could help doctors better predict and improve visual outcomes after refractive surgery.
What could go wrong
This is an observational study, not a treatment trial. It may not lead to direct changes in patient care.

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 300 people

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

Expected to start

Mar 2026

An estimate. Start dates often move.

Expected to finish

Sep 2026

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

18 to 45 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: * Myopic or myopic astigmatism patients aged 18 to 45 years. * Transparent ocular media, absence of ocular diseases such as corneal leucoma, cataract, etc. * Round pupils with normal light reflex, absence of dyscoria, corectopia, significant persistent pupillary membrane, or absence of the pupil. * Absence of severe psychological or psychiatric disorders, ability to cooperate with examinations and questionnaire completion. * Subject agrees to participate in this clinical study and cooperate with examinations and related procedures. Exclusion Criteria: * Opacities of the ocular media, such as corneal leucoma, cataract, etc. * Pupil deformation, displacement, significant persistent pupillary membrane, or absence of the pupil. * Severe psychological or psychiatric disorders. * Concurrent diagnosis of other ocular diseases (e.g., glaucoma, corneal opacity, uveitis, etc.). * History of ocular surgery or trauma. * Nystagmus or inability to cooperate.

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Conditions

The condition(s) this trial relates to.

Corneal Wavefront Aberration myopia refractive error

As listed by the trial registrant

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

Corneal wavefront aberration Refractive errors

How to take part

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

  1. 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 ↗

  2. 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.

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