Testing a new visual field device against the standard machine in glaucoma
Compares a new field-of-vision testing device with the standard machine in glaucoma patients.
Key facts
- Who runs it
- Buckinghamshire Healthcare NHS Trust
- Where
- Aylesbury, United KingdomSee the site
- Trial code
- Registry title
- World Sight Foundation Field Machine (WSFFM) Pilot
- Status
- Recruiting
- People taking part
- 100 people, planned
- Started
- 29 Apr 2026
- Planned end
- 1 Jul 2026
- Type of study
- Interventional, 2 groupsOne group gets an existing treatment, for comparison.
- Treatments tested
- World Sight Foundation Field Machine
- Comparator
- Record updated
- 29 June 2026
Who can take part
AI summary
From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.
The trial is looking for adults with glaucoma who come to the glaucoma clinic and are due to have a standard Humphrey visual field test. They will also try a new field test machine.
- Age
- 18 to 99 years
- Sex
- All sexes can join.
- Disease stage
- Glaucoma patients who attend a glaucoma outpatient clinic.
Main reasons for not taking part
- Patients who do not need visual field testing at that clinic visit
- Patients planned for SITA-FAST or SITA-FASTER Humphrey testing
- Patients who do not attend their clinic appointment
- Patients unable to do visual field testing, for example due to vision, positioning or understanding instructions
- Patients under 18 years old
The registry criteria, word for word
Show all 9 criteriaShow less
Who can take part
- - 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
Who cannot take part
- Patients under the age of 18 years old
- - 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)
Check if you might fit
Answer for yourself. This is not a decision: only the study team can say whether you can take part.
- Are you between 18 and 99 years old?
Where in United Kingdom
- Buckinghamshire Healthcare NHS TrustAylesbury, United KingdomContact: Matthew Kinsella, MDTaking people
About the trial
What the trial wants to find out
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.
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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.
The 2 groups in the trial
- World Sight Foundation Field MachineTreatment being tested
Test Device
- Humphrey Visual Field AnalyserExisting treatment, for comparison
gold standard of care comparator
Treatment: Comparator
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Contact the study team: see the registry record → Contacts and Locations
Print a page for my doctorData and sources
- Registry record
- Listed on ClinicalTrials.gov.
- Official title
- Clinical Testing Pilot of the World Sight Foundation Field Machine (WSFFM) in Glaucoma Patients - Comparison With Humphrey Visual Field Analyser
- Plain-language title
- Testing a new visual field device against the standard machine in glaucomaGenerated from the registry record. The registry title is the official one.
- AI summary
- From the trial's eligibility criteria. Read by machine on 12 November 2026.
- Fit questions
- Built from NCT07674069, who can take part
- Record updated
- 29 June 2026