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A simple pair of glasses could keep thousands of workers employed

NCT ID NCT04654013

Disease control Sponsor: Queen's University, Belfast 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 20, 2026 · Last updated Aug 21, 2026 · Updated 1 time

Summary

This trial tests whether providing free reading glasses to textile workers aged 30 and older with presbyopia (age-related difficulty seeing close up) helps them stay employed longer. Over 1,200 workers in India will either receive glasses or not, and researchers will track how many continue working at the factory. The study also explores why some workers leave their jobs, aiming to understand the broader impact of vision correction on workplace retention.

What this could mean

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

Active substance
Reading glasses (spectacles) for near vision correction
What this could lead to
If effective, providing free reading glasses to older workers with presbyopia could boost job retention and productivity in low-income settings, offering a simple, low-cost workplace intervention.
What could go wrong
The trial is early and results may not apply to other industries or countries. Compliance with wearing glasses at work could be low, and the study may not capture all factors influencing job retention.

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

1,291 people

The number who actually took part.

Started

May 2022

Finished

Dec 2024

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

30 years and older

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: * Aged 30 years and above * Distance visual acuity \>= 6/12 in both eyes * Presence of presbyopia, defined as the inability, correctable with reading glasses, to read the N8 line using both eyes together, on a tumbling near vision chart at a distance of 25cm, 30cm, 40cm, and 50cm based on workers working distance * Employed at the factory for \>=3months in the sewing department Exclusion Criteria: * Current ownership of reading or distance glasses (regardless of accuracy) * Obvious evidence of ocular disease in either eye detected during the eye examination, or history of such disease based on self-report * Low likelihood of completing follow-up in the study due to current plans to move out of the area or leave employment at Shahi during the follow-up period

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Conditions

The condition(s) this trial relates to.

presbyopia refractive error

As listed by the trial registrant

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

Presbyopia

Contacts and locations

Locations

  • Good Business Lab

    Bengaluru, Karantaka, 560102, India

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