Visual Spatial ProcessingNCT05251155
Accuracy of Mobile-Based Vision Charts.
An observational study of Visual Spatial Processing, run by Benha University at 1 site in Egypt.
Trial summary
Analyzing the accuracy of mobile-based distant vision charts in clinical practice as an economic alternative for standard vision charts. Read more about this study
- Who is it for?
- Ages 4 to 70 yearsHealthy volunteers can take part
- Conditions the study is for
- Visual Spatial Processing
- What is being tested?
- Distant best corrected visual acuity assessment
- How many people
- 288 participants
- Where
- 1 siteEgypt
- Study dates
- 1 Feb 2020to 21 Jul 2021
- Phase
- Observational
- Are there results?
- None posted in the registry
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 4 to 70 years
- All sexes
- Healthy volunteers accepted
- Child, Adult, Older adult
Study population: Subjects aimed to asses their best corrected visual acuity or seek spectacles prescription at ophthalmology clinic at Al-Nil Hospital, Banha, EGYPT.
Who may be able to join
- Subjects visited ophthalmology clinic at Al-Nil Hospital, Banha, EGYPT for visual acuity assessment.
- Subjects that their best corrected visual acuity was ranged from 0.1 to 1.0 in decimal form measured on snellen's chart.
Who cannot join
- Subjects that refuse to measure visual acuity twice during the same visit.
- Subjects that their best corrected visual acuity is less than 0.1 in decimal form by the standard chart projector.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Accuracy of Mobile-Based Vision Charts in Clinical Practice.
Analyzing the accuracy of mobile-based distant vision charts in clinical practice as an economic alternative for standard vision charts.
Read the detailed description
Accuracy of mobile-based visual acuity testing in clinical practice is still debatable. The aim of this study was to analyze the accuracy of mobile-based distant vision chart in comparison to standard chart projector.
- Conditions
- Visual Spatial Processing
- Being tested
- Distant best corrected visual acuity assessment
- Keywords
- Visual acuity, Mobile-based chart, Snellen's chart
- Medical subject headings
- Spatial Processing
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Distant best corrected visual acuity assessmentDiagnostic test
Measuring distant visual acuity on snellen's chart using two methods and results were converted to equivalent logarithm of minimum angle of resolution to compare accuracy of mobile based chart to the standard vision chart.
| Study group | Role | What they receive |
|---|---|---|
| Standard vision chart. | Best corrected visual acuity measured by standard chart projector. Receives: Diagnostic Test: Distant best corrected visual acuity assessment | |
| Mobile based vision chart. | Best corrected visual acuity measured by mobile based chart with screen mirroring over 24 inch monitor. Receives: Diagnostic Test: Distant best corrected visual acuity assessment |
What is being measured
The primary outcome is the main question the study is designed to answer.
Accuracy of mobile based "snellen chart" in measuring distant visual acuity.
To compare the decimal results of mobile based snellen chart for measuring distant vision with the decimal results of the standard snellen chart projector.
Measured: Immediately after visual acuity testing using the standard chart projector.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted22 Feb 2022
- Study start1 Feb 2020
- Primary completion11 Apr 2021
- Study completion21 Jul 2021
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Visual Spatial ProcessingStudies 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
- Observational
- Observational model
- Case only
- Time perspective
- Cross-sectional
- Enrolment
- 288 participants (actual)
Sponsor and investigators
- Lead sponsor
- Benha University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Ahmed Abdelshafy, Benha University
- Investigators
- Ahmed A Abdelshafy, MD, Study chair, Benha University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05251155
- Sponsor's protocol ID
- RC-15-2-01
- Status last verified
- Mar 2022
- First submitted
- 10 Feb 2022
- Last updated
- 29 Mar 2022
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided
Study at a glance
From the registry record, last updated by the sponsor on 29 Mar 2022. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Accuracy of Mobile-Based Vision Charts in Clinical Practice.
- ClinicalTrials.gov ID
- NCT05251155
- Acronym / sponsor ID
- RC-15-2-01
- Conditions
- Visual Spatial Processing
- Keywords
- Visual acuity, Mobile-based chart, Snellen's chart
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 288 participants (actual)
- Lead sponsor
- Benha UniversityUniversity, hospital or other
- Study start
- 1 Feb 2020 (actual)
- Primary completion
- 11 Apr 2021 (actual)
- Study completion
- 21 Jul 2021 (actual)
- First posted
- 22 Feb 2022 (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.
Analyzing the accuracy of mobile-based distant vision charts in clinical practice as an economic alternative for standard vision charts.
Detailed description
Accuracy of mobile-based visual acuity testing in clinical practice is still debatable. The aim of this study was to analyze the accuracy of mobile-based distant vision chart in comparison to standard chart projector.
Study design
- Observational model
- Case only
- Time perspective
- Cross-sectional
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Standard vision chart. | – | Diagnostic Test: Distant best corrected visual acuity assessmentBest corrected visual acuity measured by standard chart projector. |
| Mobile based vision chart. | – | Diagnostic Test: Distant best corrected visual acuity assessmentBest corrected visual acuity measured by mobile based chart with screen mirroring over 24 inch monitor. |
Who may qualify
- Ages
- 4 to 70 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult, Older adult
- Study population
- Subjects aimed to asses their best corrected visual acuity or seek spectacles prescription at ophthalmology clinic at Al-Nil Hospital, Banha, EGYPT.
Key inclusion criteria (2 listed)
- Subjects visited ophthalmology clinic at Al-Nil Hospital, Banha, EGYPT for visual acuity assessment.
- Subjects that their best corrected visual acuity was ranged from 0.1 to 1.0 in decimal form measured on snellen's chart.
Key exclusion criteria (2 listed)
- Subjects that refuse to measure visual acuity twice during the same visit.
- Subjects that their best corrected visual acuity is less than 0.1 in decimal form by the standard chart projector.
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 |
|---|---|---|
| Distant best corrected visual acuity assessmentMeasuring distant visual acuity on snellen's chart using two methods and results were converted to equivalent logarithm of minimum angle of resolution to compare accuracy of mobile based chart to the standard vision chart. | Diagnostic test | Mobile based vision chart., Standard vision chart. |
Primary outcome
Accuracy of mobile based "snellen chart" in measuring distant visual acuity.
Time frame: Immediately after visual acuity testing using the standard chart projector.
To compare the decimal results of mobile based snellen chart for measuring distant vision with the decimal results of the standard snellen chart projector.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 Mar 2022.
- Individual participant dataSharing planned: Undecided
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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. This study is not recruiting at the moment.
Ahmed A Abdelshafy, MD study chair
Benha University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Visual Spatial Processing, run by Benha University at 1 site in Egypt.
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 2 inclusion and 2 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: finished, as of the sponsor's last update on 29 Mar 2022. 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 Egypt. 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?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Accuracy of mobile based "snellen chart" in measuring distant visual acuity. (time frame: Immediately after visual acuity testing using the standard chart projector.). 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 29 Mar 2022.