Contact Lens WearNCT04840563
Surface Refractive Index Shift of Kalifilcon A Compared With Dailies Total1 and Precision1 Lenses
A study testing kalifilcon A daily disposable spherical soft contact lens, Dailies Total1 (delefilcon A) daily disposable spherical soft contact lens and Precision1 (verofilcon A) daily disposable spherical soft contact lens in people with Contact Lens Wear, run by Bausch & Lomb Incorporated at 1 site in United States.
Trial summary
This was a single-site, bilateral, repeated-measures insertion study in habitual soft contact lens wearers. Ten participants were enrolled. All participants attended a Screening/Dispensing Visit at which informed consent was obtained and eligibility was assessed. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Contact Lens Wear
- What is being tested?
- kalifilcon A daily disposable spherical soft contact lens, Dailies Total1 (delefilcon A) daily disposable spherical soft contact lens and Precision1 (verofilcon A) daily disposable spherical soft contact lens
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 10 participants
- Where
- 1 siteUnited States
- Study dates
- 7 Apr 2021to 15 Apr 2021
- Phase
- Interventional
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
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
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Be 18 years or older and have full legal capacity to volunteer.
- Have physiologically normal anterior segments not exhibiting clinically significant biomicroscopy findings.
- Have no active ocular disease or allergic conjunctivitis.
- Not be using any topical ocular medications.
- Be willing and able to follow instructions.
- Have signed a statement of informed consent.
Who cannot join
- Participating in a conflicting study in the opinion of the Investigator.
- Considered by the Investigator to not be a suitable candidate for participation.
Trial locations and contacts
1 site in 1 country.
United States1 site
Bausch & Lomb Incorporated
Rochester, New York, 14609
About this study
Official title: Evaluation of Surface Refractive Index Shift and Lens Absorption / Adsorption of Tear Components of Commercially Available Kalifilcon A Lenses Compared to Dailies Total1 and Precision1
This was a single-site, bilateral, repeated-measures insertion study in habitual soft contact lens wearers. Ten participants were enrolled. All participants attended a Screening/Dispensing Visit at which informed consent was obtained and eligibility was assessed. Eligible participants then wore each of three commercially available daily disposable soft contact lens types - kalifilcon A (Bausch + Lomb), Dailies Total1 (delefilcon A, Alcon) and Precision1 (verofilcon A, Alcon), all -3.00 D - bilaterally for wear times of 0.5, 1, 3, 5 and 10 minutes over a total of 6 study visits. A new lens pair was inserted for each wear time, with a 3-5 minute washout period between lens pairs. Immediately following removal, the right-eye lens was measured for surface refractive index on a Metricon M-2010 Prism Coupler.
Read the detailed description
Rationale: earlier work (ROC2-20-012) showed a change in surface refractive index for Dailies Total1 (delefilcon A) and Precision1 (verofilcon A) lenses after 5 minutes of wear, attributed to a change in surface water content. ROC2-21-007 was designed to determine whether that change occurs in less than 5 minutes. Three study lenses (one test, two controls) were each worn bilaterally. Wear times of 0.5, 1 and 3 minutes were completed at one visit and 5 and 10 minutes at another visit for each lens type, giving 6 visits of approximately 30 minutes each, each on a separate day; the clinical investigation took approximately 2 weeks. Lens type order followed the study randomization schedule prepared before enrolment by an unmasked statistician not otherwise involved in the study; unmasked study personnel dispensed and collected study materials so that the participant and Investigator remained masked. Endpoint: surface refractive index of the worn right-eye lens, measured on a Metricon M-2010 Prism Coupler, compared with unworn (baseline) values for the same lens types. Continuous data were summarized with n, mean, standard deviation, median, minimum and maximum, and paired t-tests were used to compare unworn with worn values, with p < 0.05 considered statistically significant.
- Conditions
- Contact Lens Wear
- Being tested
- kalifilcon A daily disposable spherical soft contact lens, Dailies Total1 (delefilcon A) daily disposable spherical soft contact lens, Precision1 (verofilcon A) daily disposable spherical soft contact lens
- Keywords
- refractive index
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
kalifilcon A daily disposable spherical soft contact lensDevice
Also called Infuse
Commercially available Infuse (kalifilcon A) daily disposable spherical soft contact lens, -3.00 D, worn bilaterally for 0.5, 1, 3, 5 and 10 minutes.
Dailies Total1 (delefilcon A) daily disposable spherical soft contact lensDevice
Commercially available Dailies Total1 (delefilcon A) daily disposable spherical soft contact lens (Alcon), -3.00 D, worn bilaterally for 0.5, 1, 3, 5 and 10 minutes.
Precision1 (verofilcon A) daily disposable spherical soft contact lensDevice
Commercially available Precision1 (verofilcon A) daily disposable spherical soft contact lens (Alcon), -3.00 D, worn bilaterally for 0.5, 1, 3, 5 and 10 minutes.
| Study group | Role | What they receive |
|---|---|---|
| All Participants: kalifilcon A, Then Dailies Total1, Then Precision1 | Other | Each participant wore all three study lens types bilaterally, one lens type per pair of visits, in the order specified by the study randomization schedule (kalifilcon A, then Dailies Total1, then Precision1). For each lens type a new lens pair was inserted for each wear time of 0.5, 1, 3, 5 and 10 minutes, with a 3-5 minute washout period between lens pairs. Wear times of 0.5, 1 and 3 minutes were completed at one visit and 5 and 10 minutes at another visit, for a total of 6 visits. Immediately after removal the right-eye lens was measured for surface refractive index on a Metricon M-2010 Prism Coupler. Receives: Device: kalifilcon A daily disposable spherical soft contact lens; Device: Dailies Total1 (delefilcon A) daily disposable spherical soft contact lens; Device: Precision1 (verofilcon A) daily disposable spherical soft contact lens |
What is being measured
The primary outcome is the main question the study is designed to answer.
Surface Refractive Index of Worn Lenses
Immediately following lens removal, the right-eye worn lens for each participant was measured for surface refractive index on a Metricon M-2010 Prism Coupler. A new lens pair was worn for each wear time. Surface refractive index is a dimensionless ratio and has no units.
Measured: Unworn lens (baseline) and immediately after 0.5, 1, 3, 5, and 10 minutes of lens wear
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted12 Apr 2021
- Study start7 Apr 2021
- Primary completion15 Apr 2021
- Study completion15 Apr 2021
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for Contact Lens WearStudies 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
- 10 participants (actual)
Sponsor and investigators
- Lead sponsor
- Bausch & Lomb Incorporated
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
- Investigators
- Jeffery Schafer, OD, MS, Principal investigator, Bausch & Lomb Incorporated
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04840563
- Sponsor's protocol ID
- ROC2-21-007
- Status last verified
- Aug 2026
- First submitted
- 7 Apr 2021
- Last updated
- 5 Aug 2026
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- Yes
- Individual data sharing
- No: Individual participant data will not be shared. This was an internal Bausch + Lomb device performance study; source data are retained in the Trial Master File.
Study at a glance
From the registry record, last updated by the sponsor on 5 Aug 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Evaluation of Surface Refractive Index Shift and Lens Absorption / Adsorption of Tear Components of Commercially Available Kalifilcon A Lenses Compared to Dailies Total1 and Precision1
- ClinicalTrials.gov ID
- NCT04840563
- Acronym / sponsor ID
- ROC2-21-007
- Conditions
- Contact Lens Wear
- Keywords
- refractive index
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 10 participants (actual)
- Lead sponsor
- Bausch & Lomb IncorporatedIndustry (pharma, biotech, devices)
- Study start
- 7 Apr 2021 (actual)
- Primary completion
- 15 Apr 2021 (actual)
- Study completion
- 15 Apr 2021 (actual)
- First posted
- 12 Apr 2021 (actual)
- Results
- Posted 5 Aug 2026
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This was a single-site, bilateral, repeated-measures insertion study in habitual soft contact lens wearers. Ten participants were enrolled. All participants attended a Screening/Dispensing Visit at which informed consent was obtained and eligibility was assessed. Eligible participants then wore each of three commercially available daily disposable soft contact lens types - kalifilcon A (Bausch + Lomb), Dailies Total1 (delefilcon A, Alcon) and Precision1 (verofilcon A, Alcon), all -3.00 D - bilaterally for wear times of 0.5, 1, 3, 5 and 10 minutes over a total of 6 study visits. A new lens pair was inserted for each wear time, with a 3-5 minute washout period between lens pairs. Immediately following removal, the right-eye lens was measured for surface refractive index on a Metricon M-2010 Prism Coupler.
Detailed description
Rationale: earlier work (ROC2-20-012) showed a change in surface refractive index for Dailies Total1 (delefilcon A) and Precision1 (verofilcon A) lenses after 5 minutes of wear, attributed to a change in surface water content. ROC2-21-007 was designed to determine whether that change occurs in less than 5 minutes. Three study lenses (one test, two controls) were each worn bilaterally. Wear times of 0.5, 1 and 3 minutes were completed at one visit and 5 and 10 minutes at another visit for each lens type, giving 6 visits of approximately 30 minutes each, each on a separate day; the clinical investigation took approximately 2 weeks. Lens type order followed the study randomization schedule prepared before enrolment by an unmasked statistician not otherwise involved in the study; unmasked study personnel dispensed and collected study materials so that the participant and Investigator remained masked. Endpoint: surface refractive index of the worn right-eye lens, measured on a Metricon M-2010 Prism Coupler, compared with unworn (baseline) values for the same lens types. Continuous data were summarized with n, mean, standard deviation, median, minimum and maximum, and paired t-tests were used to compare unworn with worn values, with p < 0.05 considered statistically significant.
Study design
- Primary purpose
- Basic science
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| All Participants: kalifilcon A, Then Dailies Total1, Then Precision1 | Other | Device: kalifilcon A daily disposable spherical soft contact lens, Device: Dailies Total1 (delefilcon A) daily disposable spherical soft contact lens, Device: Precision1 (verofilcon A) daily disposable spherical soft contact lensEach participant wore all three study lens types bilaterally, one lens type per pair of visits, in the order specified by the study randomization schedule (kalifilcon A, then Dailies Total1, then Precision1). For each lens type a new lens pair was inserted for each wear time of 0.5, 1, 3, 5 and 10 minutes, with a 3-5 minute washout period between lens pairs. Wear times of 0.5, 1 and 3 minutes were completed at one visit and 5 and 10 minutes at another visit, for a total of 6 visits. Immediately after removal the right-eye lens was measured for surface refractive index on a Metricon M-2010 Prism Coupler. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (6 listed)
- Be 18 years or older and have full legal capacity to volunteer.
- Have physiologically normal anterior segments not exhibiting clinically significant biomicroscopy findings.
- Have no active ocular disease or allergic conjunctivitis.
- Not be using any topical ocular medications.
- Be willing and able to follow instructions.
Key exclusion criteria (2 listed)
- Participating in a conflicting study in the opinion of the Investigator.
- Considered by the Investigator to not be a suitable candidate for participation.
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 |
|---|---|---|
| kalifilcon A daily disposable spherical soft contact lensAlso: InfuseCommercially available Infuse (kalifilcon A) daily disposable spherical soft contact lens, -3.00 D, worn bilaterally for 0.5, 1, 3, 5 and 10 minutes. | Device | All Participants: kalifilcon A, Then Dailies Total1, Then Precision1 |
| Dailies Total1 (delefilcon A) daily disposable spherical soft contact lensCommercially available Dailies Total1 (delefilcon A) daily disposable spherical soft contact lens (Alcon), -3.00 D, worn bilaterally for 0.5, 1, 3, 5 and 10 minutes. | Device | All Participants: kalifilcon A, Then Dailies Total1, Then Precision1 |
| Precision1 (verofilcon A) daily disposable spherical soft contact lensCommercially available Precision1 (verofilcon A) daily disposable spherical soft contact lens (Alcon), -3.00 D, worn bilaterally for 0.5, 1, 3, 5 and 10 minutes. | Device | All Participants: kalifilcon A, Then Dailies Total1, Then Precision1 |
Primary outcome
Surface Refractive Index of Worn Lenses
Time frame: Unworn lens (baseline) and immediately after 0.5, 1, 3, 5, and 10 minutes of lens wear
Immediately following lens removal, the right-eye worn lens for each participant was measured for surface refractive index on a Metricon M-2010 Prism Coupler. A new lens pair was worn for each wear time. Surface refractive index is a dimensionless ratio and has no units.
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 5 Aug 2026.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Individual participant dataSharing planned: No. Individual participant data will not be shared. This was an internal Bausch + Lomb device performance study; source data are retained in the Trial Master File.
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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.
Jeffery Schafer, OD, MS principal investigator
Bausch & Lomb Incorporated
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing kalifilcon A daily disposable spherical soft contact lens, Dailies Total1 (delefilcon A) daily disposable spherical soft contact lens and Precision1 (verofilcon A) daily disposable spherical soft contact lens in people with Contact Lens Wear, run by Bausch & Lomb Incorporated at 1 site in United States.
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 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 5 Aug 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 United States. 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?
Yes. Results are posted in the registry (first posted 5 Aug 2026). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
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?
Surface Refractive Index of Worn Lenses (time frame: Unworn lens (baseline) and immediately after 0.5, 1, 3, 5, and 10 minutes of lens wear). 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 5 Aug 2026.