Postural Neck PainNCT07532642
Radiographic Head and Neck Positional Changes in Response to Usage of Low-powered Prismatic Lenses
A study testing Prismatic low-powered lenses in people with Postural Neck Pain and Postural Imbalance, run by Lisbon Academic Medical Center - Centro Académico de Medicina de Lisboa at 1 site in Portugal.
Trial summary
This study aims to investigate the short-term modifications in head and neck positioning by usage of low-powered prismatic lenses in patients with Postural Deficiency Syndrome (PDS). A matched pair observation study was designed. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Postural Neck Pain, Postural Imbalance, Postural Disorders
- What is being tested?
- Prismatic low-powered lenses
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 20 participants
- Where
- 1 sitePortugal
- Study dates
- 27 Mar 2023to 31 May 2026
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Presentation of diagnostic criteria for Postural Deficiency Syndrome comprising of
- Two or more cardinal signs of Postural Deficiency Syndrome
- Clinical presentation of asymmetrical stance and head extension and rotation
- Presence of typical directional pseudoscotoma described in this syndrome
Who cannot join
- Vision under 8/10, strabismus or nistagmus;
- Previous eye or vestibular surgery;
- Known disease affecting the central nervous system or inner ear;
- Medication with known interference with balance and posture and
- treatment for postural and movement disorders in the previous year.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Portugal1 site, 1 recruiting
- Recruiting
CAML
Lisbon, Lisbon District
João Alves da Silva, MD, +351935457064, joao-luis@edu.ulisboa.pt
João Alves da Silva, MD
About this study
Official title: Radiographic Head and Neck Positional Changes in Response to Oculomotor Muscles Tonic Modification Using Low-powered Prismatic Lenses
This study aims to investigate the short-term modifications in head and neck positioning by usage of low-powered prismatic lenses in patients with Postural Deficiency Syndrome (PDS). A matched pair observation study was designed. Evaluation is carried out using low dose biplanar radiography before treatment and 15 minutes after lenses application.
- Conditions
- Postural Neck Pain, Postural Imbalance, Postural Disorders
- Being tested
- Prismatic low-powered lenses
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Prismatic low-powered lensesDevice
Participants perform biplanar X-ray before and after lens application
| Study group | Role | What they receive |
|---|---|---|
| Unique | Experimental | Not described Receives: Device: Prismatic low-powered lenses |
What is being measured
The primary outcome is the main question the study is designed to answer.
Radiographic modification of pelvic tilt angle
Changes in pelvic tilt angle are measured between two subsequent radiographic biplanar scans in standing position, before and after lenses application on the same patient. Measurement is performed in degrees using the radiographic equipment proprietary software (EOS imaging). A minimum clinical significance value of 3 degrees was estimated.
Measured: From enrollment to second radiographic evaluation on day 1
Radiographic modification of C0 inclination
Changes in C0 inclination angle are measured between two subsequent radiographic biplanar scans in standing position, before and after lenses application on the same patient. Measurement is performed in degrees using the radiographic equipment proprietary software (EOS imaging). A minimum clinical significance value of 3 degrees was estimated.
Measured: From enrollment to second radiographic evaluation at day 1
Radiographic modification of cervical spinal vertical alignment
Changes of cervical spinal vertical alignment are measured between two subsequent radiographic biplanar scans in standing position, before and after lenses application on the same patient. Measurement is performed in millimeters using the radiographic equipment proprietary software (EOS imaging). A minimum clinical significance value of 2 millimeters was estimated.
Measured: From enrollment to second radiographic evaluation at day 1
Secondary outcomes (4)
Radiographic modification of cervical lordosis
Changes of cervical lordosis angle are measured between two subsequent radiographic biplanar scans in standing position, before and after lenses application on the same patient. Measurement is performed in degrees using the radiographic equipment proprietary software (EOS imaging).
Measured: From enrollment to second radiographic evaluation at day 1
Radiographic modification of inclination of C1
Changes of C1 inclination angle are measured between two subsequent radiographic biplanar scans in standing position, before and after lenses application on the same patient. Measurement is performed in degrees using the radiographic equipment proprietary software (EOS imaging).
Measured: From enrollment to second radiographic evaluation at day 1
Radiographic modification of inclination of C2
Changes of C2 inclination angle are measured between two subsequent radiographic biplanar scans in standing position, before and after lenses application on the same patient. Measurement is performed in degrees using the radiographic equipment proprietary software (EOS imaging).
Measured: From enrollment to second radiographic evaluation at day 1
Radiographic modification of global spinal vertical alignment
Changes of global spinal vertical alignment are measured between two subsequent radiographic biplanar scans in standing position, before and after lenses application on the same patient. Measurement is performed in millimeters using the radiographic equipment proprietary software (EOS imaging).
Measured: From enrollment to second radiographic evaluation at day 1
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted16 Apr 2026
- Study start27 Mar 2023
- Primary completion31 May 2026 (estimated)
- Study completion31 May 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Postural Neck PainStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Basic science
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 20 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Lisbon Academic Medical Center - Centro Académico de Medicina de Lisboa
- Sponsor type
- Research network
- Responsible party
- Principal investigator, João Alves da Silva, Lisbon Academic Medical Center - Centro Académico de Medicina de Lisboa
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07532642
- Sponsor's protocol ID
- Refª. Nº 282/21
- Status last verified
- Apr 2026
- First submitted
- 6 Apr 2026
- Last updated
- 16 Apr 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: All measurements performed from imaging studies
Study at a glance
From the registry record, last updated by the sponsor on 16 Apr 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Radiographic Head and Neck Positional Changes in Response to Oculomotor Muscles Tonic Modification Using Low-powered Prismatic Lenses
- ClinicalTrials.gov ID
- NCT07532642
- Acronym / sponsor ID
- Refª. Nº 282/21
- Conditions
- Postural Neck Pain, Postural Imbalance, Postural Disorders
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 20 participants (estimated)
- Lead sponsor
- Lisbon Academic Medical Center - Centro Académico de Medicina de LisboaResearch network
- Study start
- 27 Mar 2023 (actual)
- Primary completion
- 31 May 2026 (estimated)
- Study completion
- 31 May 2026 (estimated)
- First posted
- 16 Apr 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study aims to investigate the short-term modifications in head and neck positioning by usage of low-powered prismatic lenses in patients with Postural Deficiency Syndrome (PDS). A matched pair observation study was designed. Evaluation is carried out using low dose biplanar radiography before treatment and 15 minutes after lenses application.
Study design
- Primary purpose
- Basic science
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Unique | Experimental | Device: Prismatic low-powered lenses |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Presentation of diagnostic criteria for Postural Deficiency Syndrome comprising of
- Two or more cardinal signs of Postural Deficiency Syndrome
- Clinical presentation of asymmetrical stance and head extension and rotation
- Presence of typical directional pseudoscotoma described in this syndrome
Key exclusion criteria (5 listed)
- Vision under 8/10, strabismus or nistagmus;
- Previous eye or vestibular surgery;
- Known disease affecting the central nervous system or inner ear;
- Medication with known interference with balance and posture and
- treatment for postural and movement disorders in the previous year.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Prismatic low-powered lensesParticipants perform biplanar X-ray before and after lens application | Device | Unique |
Primary outcome
Radiographic modification of pelvic tilt angle
Time frame: From enrollment to second radiographic evaluation on day 1
Changes in pelvic tilt angle are measured between two subsequent radiographic biplanar scans in standing position, before and after lenses application on the same patient. Measurement is performed in degrees using the radiographic equipment proprietary software (EOS imaging). A minimum clinical significance value of 3 degrees was estimated.
Radiographic modification of C0 inclination
Time frame: From enrollment to second radiographic evaluation at day 1
Changes in C0 inclination angle are measured between two subsequent radiographic biplanar scans in standing position, before and after lenses application on the same patient. Measurement is performed in degrees using the radiographic equipment proprietary software (EOS imaging). A minimum clinical significance value of 3 degrees was estimated.
Radiographic modification of cervical spinal vertical alignment
Time frame: From enrollment to second radiographic evaluation at day 1
Changes of cervical spinal vertical alignment are measured between two subsequent radiographic biplanar scans in standing position, before and after lenses application on the same patient. Measurement is performed in millimeters using the radiographic equipment proprietary software (EOS imaging). A minimum clinical significance value of 2 millimeters was estimated.
4 secondary outcomes
Radiographic modification of cervical lordosis
Time frame: From enrollment to second radiographic evaluation at day 1
Radiographic modification of inclination of C1
Time frame: From enrollment to second radiographic evaluation at day 1
Radiographic modification of inclination of C2
Time frame: From enrollment to second radiographic evaluation at day 1
Radiographic modification of global spinal vertical alignment
Time frame: From enrollment to second radiographic evaluation at day 1
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 16 Apr 2026.
- Individual participant dataSharing planned: Yes. All measurements performed from imaging studies
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Prismatic low-powered lenses in people with Postural Neck Pain and Postural Imbalance, run by Lisbon Academic Medical Center - Centro Académico de Medicina de Lisboa at 1 site in Portugal.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 16 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Portugal. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact João Alves da Silva, MD (+351935457064, joao-luis@edu.ulisboa.pt), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Radiographic modification of pelvic tilt angle (time frame: From enrollment to second radiographic evaluation on day 1). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 16 Apr 2026.