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Thirsty eyes? study tests how water intake changes eye measurements

NCT ID NCT07177131

Knowledge-focused Sponsor: Ante Kreso 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Updated 1 time

Summary

This study looks at how being dehydrated or drinking lots of water changes key eye measurements, like the thickness of the retina and cornea. Sixty healthy adults will have their eyes scanned after avoiding water for 12 hours and again after drinking 2 liters of water. The results could help eye doctors plan surgeries more accurately.

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 understand how hydration affects eye measurements, potentially improving the accuracy of eye surgeries like cataract or refractive procedures.
What could go wrong
This is a small, early-stage study with only 60 healthy volunteers. Results may not apply to people with eye diseases or other health conditions.

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 60 people

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

Expected to start

Sep 2025

An estimate. Start dates often move.

Expected to finish

Dec 2025

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 65 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: * Healthy adult volunteers aged 18 to 65 years * Normal ophthalmological findings * Best corrected visual acuity (BCVA) ≥ 1.0 (decimal) * Willingness to participate and provide written informed consent Exclusion Criteria: * Known ocular diseases (e.g., glaucoma, keratoconus, retinal pathology) * History of ocular surgery * Systemic diseases affecting hydration status (e.g., diabetes mellitus, kidney disease) * Any condition that, in the investigator's opinion, could interfere with study participation or data quality * Refusal to participate

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As listed by the trial registrant

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

Hydration status Macular thickness Ocular biometry

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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