Cataract SurgeryNCT04247152
Comparison of Pre-operative Measurements With Intraoperative Aberrometry in Predicting Correction for Low Toric Lens Correction in Cataract Surgery
A study testing Intraoperative Aberrometry vs preoperative biometry in people with Cataract Surgery, run by Research Insight LLC at 1 site in United States.
Trial summary
Examination of the accuracy of toric predictive power in patients with 1.5 diopters of astigmatism or less. Read more about this study
- Who is it for?
- Any ageHealthy volunteers can take part
- Conditions the study is for
- Cataract Surgery
- What is being tested?
- Intraoperative Aberrometry vs preoperative biometry
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 200 participants
- Where
- 1 siteUnited States
- Study dates
- 22 Jul 2019to 25 Sep 2019
- 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 Any age
- All sexes
- Healthy volunteers accepted
- Child, Adult, Older adult
Who may be able to join
- Patients who underwent conventional (non-femtosecond) cataract surgery and whose "data to be collected" are accessible and available from the ORA database.
- Patients whose medical records show they did not exhibit any significant ocular morbidity that would be expected to influence outcome measures.
Who cannot join
- Patients with visually significant co-morbidities (corneal, retina, optic nerve disease) that could affect their visual outcome or ability to be refracted after.
- Patients with surgical complications either during or after surgery (capsule tears, iris trauma, decentered IOL, cystoid macular edema, etc.)
- Patients with previous refractive surgery.
Trial locations and contacts
1 site in 1 country.
United States1 site
Harvard Eye Associates
Laguna Hills, California, 92653
About this study
Official title: Comparison of Pre-operative Measurements With Intraoperative Aberrometry in Predicting Needed Correction for Low Toric Lens Correction in Cataract Surgery
Examination of the accuracy of toric predictive power in patients with 1.5 diopters of astigmatism or less.
Read the detailed description
Based on preoperative keratometry and using the Baylor Nomogram and a standard factor for surgically-induced astigmatism, the investigators will calculate "keratometry-based total astigmatism" for each patient. This will be compared to "aberrometry-based total astigmatism", i.e. the total astigmatism measured by ORA in each case. With this information the investigators will determine in what portion of patients keratometry-based total astigmatism vs aberrometry-based total astigmatism predicts a need for astigmatism correction, (i.e., total astigmatism is greater than or equal to 0.5 D) during cataract surgery.
- Conditions
- Cataract Surgery
- Being tested
- Intraoperative Aberrometry vs preoperative biometry
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Intraoperative Aberrometry vs preoperative biometryOther
Hypothesis: Intraoperative aberrometry measures lower levels of astigmatism more accurately than preoperative biometry in patients undergoing cataract surgery.
| Study group | Role | What they receive |
|---|---|---|
| Intraoperative Aberrometry vs Preoperative Biometry | Other | Retrospective view of existing chart data. Receives: Other: Intraoperative Aberrometry vs preoperative biometry |
What is being measured
The primary outcome is the main question the study is designed to answer.
Proportion of Patients requiring Astigmatism Correction
Proportion of patients requiring astigmatism correction, i.e., having need for astigmatism correction of greater than or equal to 0.5 D during cataract surgery, when measured by preoperative keratometry vs intraoperative aberrometry.
Measured: up to 3 months
Secondary outcomes (2)
Patients with Postoperative residual astigmatism 0.5 to 1.0 diopter
Looking at patients whose ORA-based total astigmatism was greater than or equal to 0.5 and less than or equal to 1.0 diopter, did patients receiving astigmatism correction have less postoperative residual astigmatism than those who did not receive astigmatism correction?
Measured: up to 3 months
Patients with Postoperative residual astigmatism 1.0 to 1.5 diopter
Looking at patients whose ORA-based total astigmatism was greater than 1.0 and less than or equal to 1.5 diopter,m did patients receiving astigmatism correction have less postoperative residual astigmatism than those who did not receive astigmatism correction?
Measured: up to 3 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted29 Jan 2020
- Study start22 Jul 2019
- Primary completion25 Sep 2019
- Study completion25 Sep 2019
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Cataract SurgeryStudies 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
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 200 participants (actual)
Sponsor and investigators
- Lead sponsor
- Research Insight LLC
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04247152
- Sponsor's protocol ID
- 1909 ORA vs Biometry
- Status last verified
- Jan 2020
- First submitted
- 24 Jan 2020
- Last updated
- 20 Apr 2020
- Results posted
- No
- Data monitoring committee
- No
- 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 20 Apr 2020. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparison of Pre-operative Measurements With Intraoperative Aberrometry in Predicting Needed Correction for Low Toric Lens Correction in Cataract Surgery
- ClinicalTrials.gov ID
- NCT04247152
- Acronym / sponsor ID
- 1909 ORA vs Biometry
- Conditions
- Cataract Surgery
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 200 participants (actual)
- Lead sponsor
- Research Insight LLCIndustry (pharma, biotech, devices)
- Study start
- 22 Jul 2019 (actual)
- Primary completion
- 25 Sep 2019 (actual)
- Study completion
- 25 Sep 2019 (actual)
- First posted
- 29 Jan 2020 (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.
Examination of the accuracy of toric predictive power in patients with 1.5 diopters of astigmatism or less.
Detailed description
Based on preoperative keratometry and using the Baylor Nomogram and a standard factor for surgically-induced astigmatism, the investigators will calculate "keratometry-based total astigmatism" for each patient. This will be compared to "aberrometry-based total astigmatism", i.e. the total astigmatism measured by ORA in each case. With this information the investigators will determine in what portion of patients keratometry-based total astigmatism vs aberrometry-based total astigmatism predicts a need for astigmatism correction, (i.e., total astigmatism is greater than or equal to 0.5 D) during cataract surgery.
Study design
- Primary purpose
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Intraoperative Aberrometry vs Preoperative Biometry | Other | Other: Intraoperative Aberrometry vs preoperative biometryRetrospective view of existing chart data. |
Who may qualify
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult, Older adult
Key inclusion criteria (2 listed)
- Patients who underwent conventional (non-femtosecond) cataract surgery and whose "data to be collected" are accessible and available from the ORA database.
- Patients whose medical records show they did not exhibit any significant ocular morbidity that would be expected to influence outcome measures.
Key exclusion criteria (3 listed)
- Patients with visually significant co-morbidities (corneal, retina, optic nerve disease) that could affect their visual outcome or ability to be refracted after.
- Patients with surgical complications either during or after surgery (capsule tears, iris trauma, decentered IOL, cystoid macular edema, etc.)
- Patients with previous refractive surgery.
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 |
|---|---|---|
| Intraoperative Aberrometry vs preoperative biometryHypothesis: Intraoperative aberrometry measures lower levels of astigmatism more accurately than preoperative biometry in patients undergoing cataract surgery. | Other | Intraoperative Aberrometry vs Preoperative Biometry |
Primary outcome
Proportion of Patients requiring Astigmatism Correction
Time frame: up to 3 months
Proportion of patients requiring astigmatism correction, i.e., having need for astigmatism correction of greater than or equal to 0.5 D during cataract surgery, when measured by preoperative keratometry vs intraoperative aberrometry.
2 secondary outcomes
Patients with Postoperative residual astigmatism 0.5 to 1.0 diopter
Time frame: up to 3 months
Patients with Postoperative residual astigmatism 1.0 to 1.5 diopter
Time frame: up to 3 months
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 20 Apr 2020.
- Individual participant dataSharing planned: No
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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.
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 Intraoperative Aberrometry vs preoperative biometry in people with Cataract Surgery, run by Research Insight LLC 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 2 inclusion and 3 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 20 Apr 2020. 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?
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?
Proportion of Patients requiring Astigmatism Correction (time frame: up to 3 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 20 Apr 2020; AzTrials last refreshed its copy on 7 Nov 2026.