An observational study in Refractive Errors, sponsored by London Vision Clinic. Recruiting at 2 sites in India. Per ClinicalTrials.gov, last updated 2026-01-09.
Sponsored by London Vision Clinic · Observational
Among 10 studies in Refractive Errors with a site in India — 2 open to participants now, 3 under way, none of them phase 3. Refractive Errors · India.
Among the 10 studies in Refractive Errors with a site in India, this one is the only one that started in 2025, is the only observational one, and was the 9th registered.
420 studies on the registry are indexed under Refractive Errors; 59 are open to participants now.
This study's planned enrollment of 150 is close to the median of 150 across 108 observational studies indexed under Refractive Errors.
Browse Refractive Errors studies →2 of the 10 studies in Refractive Errors with a site in India are open now, in 1 country. Each count lists the studies.
Of the 30 Refractive Errors studies recruiting now, 8 (27%) set no upper age limit and 19 (63%) stop at 75 or younger; 16 take children under 18; 18 take healthy volunteers.
This study: all sexes · no healthy volunteers.
The full table on the hub →10 studies; the count open now beside each. This study's row is marked.
First in 2008; this study’s year is marked. 1 started in 2025.
Median enrollment 682 across the 9 interventional studies, 150 across the 1 observational. Of the 7 that completed or were terminated, 1 (14%) have results posted.
2 of 10 have an industry lead sponsor. The 7 most frequent:
London Vision Clinic is the lead sponsor of 6 studies on the registry; 2 are open to participants now.
London Vision Clinic has 2 studies filed under Refractive Errors — fewer than ten, so there is no comparison to draw.
2 of the studies in Refractive Errors with a site in India that are under way reach primary completion within a year, 0 of them phase 3. Phase 3 first, then by date:
| Study | Primary completion |
|---|---|
| NCT06996353London Vision ClinicClinical Data Collection of Myopic Patients After PTK-PRK With CZM MEL 90 Excimer Laser | 2026-11 |
| NCT07333248Seva Canada SocietyStrengthening Community- to- Hospital Eye Care Pathways From Boko Eye Care Center in Rural Assam | 2027-01-31 |
Among the 10 studies in Refractive Errors with a site in India, from their registry updates:
The objective of the clinical investigation presented to is to verify predictions of post-operative PTK-PRK refractive outcome made by the EpiMaster application software by comparing these to post-operative clinical data after routine PTK-PRK treatments.
The objective of the clinical investigation presented to is to verify predictions of post-operative PTK-PRK refractive outcome made by the EpiMaster application software by comparing these to post-operative clinical data after routine PTK-PRK treatments.
The EpiMaster application software is not used in this clinical investigation, consequently, it is a merely observational investigation.
Patient present with myopic or myopic and astigmatic error
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The PTK-PRK refractive treatment will be done according to routine clinical practice.
Difference of SE(measured) and SE(predicted by EpiMaster)
Percentage of eyes with SE6 months post-op "measured" - SEpredicted by EpiMaster within ±1.00D, with SE being the spherical equivalent
Time frame: 6 months
Plan to share: No — The plan is to not share IPD.
No publications or documents are linked to this record.
Started May 2025 (actual). Primary completion is estimated for Nov 2026, 18 months after the start.
Of 35 non-industry observational studies under Refractive Errors, half reached primary completion within 26 months of starting (the median), counting those still running; a quarter within 8 and three quarters within 47. This study's planned 18 months is below that.
Counting every sponsor, half of 42 studies reached it within 19 months; a quarter within 8 and three quarters within 47.
How these figures are worked out, and which studies are left out of them.
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
Contact study teamGet an email when the registry record changes — status, dates, results — or when someone posts here.
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London Vision Clinic