NCT07674069Recruiting
World Sight Foundation Field Machine (WSFFM) Pilot
Clinical Testing Pilot of the World Sight Foundation Field Machine (WSFFM) in Glaucoma Patients - Comparison With Humphrey Visual Field Analyser
Source: ClinicalTrials.gov · Last updated 29 Jun 2026
Brief summary (registry, in English)
The current situation outside of large cities in lower-income countries, as described above, is suboptimal for the diagnosis of glaucoma. Doctors have no means of assessing visual fields, and as such may not be able to identify the condition until too advanced for any meaningful intervention (ie, to enable preservation of vision). Vision loss from glaucoma is irreversible. Understanding, through this pilot study, how well the World Sight Foundation Field Machine (WSFFM) works is an essential step towards trialling its use in lower-income countries. The justification for enabling this is to allow clinicians in the developing world to make more informed assessments of their glaucoma patient's status; this should translate in more timely treatments or referral for further investigation before further irreversible vision loss. The WSFFM will be compared to the Humphrey Visual Field (HVF) analyser. The HVF analyser is the gold standard method of measuring visual fields; in our hospital eye service it is almost exclusively the method used, and as such the field technicians are particularly skilled in their use. The output data of the HVF enables easy quantification of level of field loss; by comparing the output from the WSFFM it would be possible to allow some form of quantification against "the standard" such that an idea of how well it works may be calculated.
- Status (registry)
- Recruiting
- Study type
- Interventional
- Enrollment
- 100 (estimated)
- First submitted
- 9 Sept 2025
- Start date
- Apr 2026
- Primary completion date
- Jul 2026
- Lead sponsor
- Buckinghamshire Healthcare NHS Trust
- Diseases
- Glaucoma
- NCT number
- NCT07674069
What you commit to
- Study type: Interventional
- Planned participants: 100
- From Apr 2026 to the primary completion date, Jul 2026
- 1 site in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Age
- Patients under the age of 18 years old.
Other
- \- Patients not requiring visual field testing on that outpatient clinic attendance.
- Patients requiring visual field testing, with plan for "SITA-FAST" or "SITA-FASTER" HVF testing.
- Patients who do not attend their outpatient clinic appointment,
- Patients not able to perform visual field testing (for example due to their visual acuity, physical difficulty in positioning for test duration, or cognitive difficulties in understanding instructions).
Who the study is looking for
- \- Patients attending glaucoma outpatient clinic
- Patients requiring visual field testing, with plan for "SITA-STANDARD" HVF testing
- Patients 18 years or older and of any gender
- Patients capable of giving informed consent.
Age in the registry: 18 years to 99 years · Sex: All · Does not accept healthy volunteers
Sites (1)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Buckinghamshire Healthcare NHS Trust Coordinator of this site? Confirm its status | Aylesbury | United Kingdom | Recruiting |
This page is information, not medical advice. Discuss any trial with your doctor.