Low Vision AidsNCT06407336
Comparative Effect of Cylindrical Lenses Verses Spherical Equilient on Contrast Sensitivity
A study testing Contrast sensitivity and Refraction in people with Low Vision Aids, run by Superior University at 1 site in Pakistan.
Trial summary
the concept of spherical equivalent plays a pivotal role in simplifying the prescription and enhancing communication between eye care professionals and patients. The spherical equivalent is a calculated value that condenses the spherical and cylindrical components into a single power. Read more about this study
- Who is it for?
- Ages 18 to 35 yearsHealthy volunteers can take part
- Conditions the study is for
- Low Vision Aids
- What is being tested?
- Contrast sensitivity and Refraction
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 68 participants
- Where
- 1 sitePakistan
- Study dates
- 1 Oct 2023to 1 Sep 2024
- Phase
- Interventional
- 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 18 to 35 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- Patients within 18 to 35 years will be included.
- Both genders will be included.
- Patients having astigmatism will be included.
- Patients having 6/6 corrected vision will be included.
- Eyes having no other ocular pathology will be included.
- Patients having no history of ocular surgery or corneal scar will be included.
Who cannot join
- i. Eyes having any ocular pathology will be excluded.
- Patients with corneal suture will be excluded.
- Those using contact lenses instead of spectacles for vision correction will be excluded.
- Participants with a history of eye surgery within the past year will be excluded.
Trial locations and contacts
1 site in 1 country.
About this study
the concept of spherical equivalent plays a pivotal role in simplifying the prescription and enhancing communication between eye care professionals and patients. The spherical equivalent is a calculated value that condenses the spherical and cylindrical components into a single power.
Read the detailed description
Mathematically, it is determined by adding half of the cylindrical power to the spherical power (SE = Sphere + (Cylinder/2)). This calculated value serves as a convenient representation of the overall refractive error, aiding in a more straightforward understanding of the prescription. Understanding their individual and collective impact on contrast sensitivity opens up new avenues for refining corrective interventions and enhancing the overall quality of vision. This article aims to demystify the intricate relationship between spherical equivalent and cylindrical correction, and their collective impact on contrast sensitivity.
- Conditions
- Low Vision Aids
- Being tested
- Contrast sensitivity, Refraction
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Contrast sensitivityDiagnostic test
Contrast sensitivity will be assessed by using two different techniques of refraction on is Cylinderical lens and other is Spherical equivalent
RefractionOther
Refraction will be performed and contrast sensitivity will be assessed to assess patient comfort level and compliance.
| Study group | Role | What they receive |
|---|---|---|
| Contrast sensitivity | Experimental | Not described Receives: Diagnostic Test: Contrast sensitivity |
| Refraction | Other | Not described Receives: Other: Refraction |
What is being measured
The primary outcome is the main question the study is designed to answer.
Contrast sensitivity
The ability to perceive sharp and clear outlines of very small objects. It is also defined as the ability to identify minute differences in the shadings and patterns. CS helps detect objects without a clear outline and distinguish them from their background contrast
Measured: 12 Months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted9 May 2024
- Study start1 Oct 2023
- Primary completion1 Mar 2024
- Study completion1 Sep 2024 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Low Vision AidsStudies of the same condition, open and under way.
- More trials run by Superior UniversityThe sponsor's other registered studies.
- 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
- Diagnosis
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 68 participants (actual)
Sponsor and investigators
- Lead sponsor
- Superior University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Muhammad Naveed Babur, Superior University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06407336
- Sponsor's protocol ID
- MSRSW/Batch-Fall22/702
- Status last verified
- May 2024
- First submitted
- 2 May 2024
- Last updated
- 9 May 2024
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 9 May 2024. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparative Effect of Cylindrical Lenses Verses Spherical Equilient on Contrast Sensitivity
- ClinicalTrials.gov ID
- NCT06407336
- Acronym / sponsor ID
- MSRSW/Batch-Fall22/702
- Conditions
- Low Vision Aids
- Study type
- Interventional
- Recruitment status
- Unknown status
- Enrolment
- 68 participants (actual)
- Lead sponsor
- Superior UniversityUniversity, hospital or other
- Study start
- 1 Oct 2023 (actual)
- Primary completion
- 1 Mar 2024 (actual)
- Study completion
- 1 Sep 2024 (estimated)
- First posted
- 9 May 2024 (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.
the concept of spherical equivalent plays a pivotal role in simplifying the prescription and enhancing communication between eye care professionals and patients. The spherical equivalent is a calculated value that condenses the spherical and cylindrical components into a single power.
Detailed description
Mathematically, it is determined by adding half of the cylindrical power to the spherical power (SE = Sphere + (Cylinder/2)). This calculated value serves as a convenient representation of the overall refractive error, aiding in a more straightforward understanding of the prescription. Understanding their individual and collective impact on contrast sensitivity opens up new avenues for refining corrective interventions and enhancing the overall quality of vision. This article aims to demystify the intricate relationship between spherical equivalent and cylindrical correction, and their collective impact on contrast sensitivity.
Study design
- Primary purpose
- Diagnosis
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Contrast sensitivity | Experimental | Diagnostic Test: Contrast sensitivity |
| Refraction | Other | Other: Refraction |
Who may qualify
- Ages
- 18 to 35 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (6 listed)
- Patients within 18 to 35 years will be included.
- Both genders will be included.
- Patients having astigmatism will be included.
- Patients having 6/6 corrected vision will be included.
- Eyes having no other ocular pathology will be included.
Key exclusion criteria (4 listed)
- i. Eyes having any ocular pathology will be excluded.
- Patients with corneal suture will be excluded.
- Those using contact lenses instead of spectacles for vision correction will be excluded.
- Participants with a history of eye surgery within the past year will be excluded.
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 |
|---|---|---|
| Contrast sensitivityContrast sensitivity will be assessed by using two different techniques of refraction on is Cylinderical lens and other is Spherical equivalent | Diagnostic test | Contrast sensitivity |
| RefractionRefraction will be performed and contrast sensitivity will be assessed to assess patient comfort level and compliance. | Other | Refraction |
Primary outcome
Contrast sensitivity
Time frame: 12 Months
The ability to perceive sharp and clear outlines of very small objects. It is also defined as the ability to identify minute differences in the shadings and patterns. CS helps detect objects without a clear outline and distinguish them from their background contrast
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 9 May 2024.
- Individual participant dataSharing planned: No
Related trials for Low Vision Aids
Recruiting
Assessing the Impact of eSight Go At-Home Usage in Individuals With Visual Impairment
Low Vision Aids
Recruiting
Beacon Sensors and Telerehabilitation to Assess and Improve Use of Devices (BeST-AID) for Low Vision
Low Vision, Low Vision Aids
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.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Contrast sensitivity and Refraction in people with Low Vision Aids, run by Superior University at 1 site in Pakistan.
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 6 inclusion and 4 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: status not confirmed, as of the sponsor's last update on 9 May 2024. 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 Pakistan. 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?
Results are not available in the source record.
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?
Contrast sensitivity (time frame: 12 Months). 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 9 May 2024; AzTrials last refreshed its copy on 6 Nov 2026.