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Dry eye treatment may sharpen cataract surgery precision

NCT ID NCT07657858

Knowledge-focused Sponsor: Jin Yang Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at whether dry eye disease affects the accuracy of corneal measurements needed for cataract surgery planning. 400 cataract patients will be divided into those with and without dry eye. Those with dry eye will use sodium hyaluronate eye drops for two weeks. Researchers will then compare measurements from three different devices to see if treatment improves consistency.

What this could mean

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

Active substance
Sodium Hyaluronate Eye Drops
What this could lead to
If successful, this could show that treating dry eye before cataract surgery leads to more accurate measurements for selecting the right lens implant.
What could go wrong
This is an early-stage observational study, not a treatment trial. The eye drops are a short-term intervention, and results may not apply to all patients or devices.

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 400 people

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

Started

Jan 2026

Expected to finish

Dec 2030

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

Children (under 18), adults (18 to 64) and older adults (65 and over)

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: * Patients with age-related cataract undergoing preoperative ocular examination. * Ability to complete ocular surface evaluation, including the Ocular Surface * Disease Index questionnaire, non-invasive tear film break-up time, tear meniscus height, Schirmer test, and ocular surface staining. * Ability to complete repeated corneal astigmatism measurements using IOLMaster 700, Pentacam AXL, and iTrace Prime. * Ability to maintain stable fixation during device measurements. Provision of written informed consent. Exclusion Criteria: * Previous ocular surgery or ocular trauma. * Corneal degeneration, corneal dystrophy, or other corneal diseases that could affect corneal measurements. * Active corneal or conjunctival infection. * Uveitis. * Use of any topical eye drops within 24 hours before examination. * Use of antiglaucoma medications. * Contact lens wear within 1 month before examination. * Previous or ongoing treatment for dry eye disease. * Poor fixation during device measurements. * Poor-quality measurements from any study device

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Conditions

The condition(s) this trial relates to.

astigmatism cataract dry eye syndrome senile cataract

As listed by the trial registrant

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

Cataract Dry eye

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

  • Eye and ENT hospital of Fudan University

    RECRUITING

    Shanghai, Shanghai Municipality, 200000, China

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