CataractPhase 4NCT01763151
Comparison of Toric IOL Implantation and Opposite Clear Corneal Incision During Cataract Surgery to Correct Corneal Astigmatism
A Phase 4 study testing toric IOL and IOL combined with opposite clear corneal incision (OCCI) in people with Cataract and Corneal Astigmatism, run by Vienna Institute for Research in Ocular Surgery at 1 site in Austria.
Trial summary
With increasing demands of patients concerning refractive outcome after cataract surgery, toric intraocular lenses (IOLs) that correct corneal astigmatism have been introduced more widely to cataract surgery. Read more about this study
- Who is it for?
- Ages 21 years and older
- Conditions the study is for
- Cataract, Corneal Astigmatism
- What is being tested?
- toric IOL and IOL combined with opposite clear corneal incision (OCCI)
- Type of treatment
- Medical device, Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 55 participants
- Where
- 1 siteAustria
- Study dates
- Sep 2010to Dec 2012
- Phase
- Phase 4
- 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 21 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Cataract
- Age 21 and older
- Regular corneal astigmatism 1.0 up to 2.5 D
- written informed consent prior to surgery
Who cannot join
- Relevant other ophthalmic diseases such as: pseudoexfoliation, glaucoma, traumatic cataract corneal scars, and other co-morbidity that could affect capsule bag stability ( e.g. Marfan syndrome)
- Irregular corneal astigmatism on corneal topography
Trial locations and contacts
1 site in 1 country.
Austria1 site
Vienna Institute for Research in Ocular Surgery (VIROS), Hanusch Hospital
Vienna, 1140
About this study
With increasing demands of patients concerning refractive outcome after cataract surgery, toric intraocular lenses (IOLs) that correct corneal astigmatism have been introduced more widely to cataract surgery. Originally toric IOLs were used mainly for patients with high degrees of astigmatism, especially after corneal surgical procedures such as penetrating keratoplasty. Since a couple of years, toric IOLs are available from numerous manufacturers to correct lower amounts of astigmatism which are much more prevalent with about 30% having a corneal astigmatism of 0.75D or more in the cataract population. This should result in less spectacle dependence of patients due to the astigmatic correction.
The alternative method to reduce corneal astigmatism as part of cataract surgery is to make incisions on the steeper axis of the cornea such as limbal relaxing incisions or an additional clear corneal incision opposite (OCCI) to the main cataract opening. These techniques are in use since more than 2 decades and are widely used in clinical routine. As with toric IOLs, precise alignment of the cuts with the axis of astigmatism is essential. The disadvantage of the incisional techniques is the variability of the effect between patients since it depends on factors such as the extent of scaring of the cuts after surgery as well as corneal thickness. The main advantage is the simplicity of the technique and the lower cost.
Aim of this study is to compare toric IOL implantation and opposite clear corneal incision during cataract surgery to correct corneal astigmatism.
- Conditions
- Cataract, Corneal Astigmatism
- Being tested
- toric IOL, IOL combined with opposite clear corneal incision (OCCI)
- Keywords
- cataract surgery, astigmatism, opposite clear corneal incision, toric IOL, IOL rotational stability
- Medical subject headings
- Cataract, Astigmatism
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
toric IOLDevice
implantation of an aspheric, toric, acrylic IOL during cataract surgery
IOL combined with opposite clear corneal incision (OCCI)Procedure or surgery
aspherical, acrylic IOL with opposite clear corneal incision during cataract surgery
| Study group | Role | What they receive |
|---|---|---|
| toric IOL | Active comparator | aspherical, toric acrylic IOL (Lentis L-312T, Oculentis, Germany) Receives: Device: toric IOL |
| IOL combined with opposite clear corneal incision (OCCI) | Active comparator | aspherical, acrylic IOL with OCCI Receives: Procedure: IOL combined with opposite clear corneal incision (OCCI) |
What is being measured
The primary outcome is the main question the study is designed to answer.
Postoperative residual astigmatism
Measured: 9 months post-operatively
Secondary outcomes (1)
uncorrected distance visual acuity (UDVA)
Measured: 9 months post-operatively
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted8 Jan 2013 (estimated)
- Study startSep 2010
- Primary completionAug 2012
- Study completionDec 2012
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for CataractStudies 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 4
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Who is masked
- Participant, Investigator
- Enrolment
- 55 participants (actual)
Sponsor and investigators
- Lead sponsor
- Vienna Institute for Research in Ocular Surgery
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Prim. Prof. Dr. Oliver Findl, MBA, Vienna Institute for Research in Ocular Surgery
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01763151
- Sponsor's protocol ID
- Viros_Askin
- Status last verified
- Jan 2013
- First submitted
- 6 Jan 2013
- Last updated
- 10 Jan 2013
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 10 Jan 2013. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparison of Toric IOL Implantation and Opposite Clear Corneal Incision During Cataract Surgery to Correct Corneal Astigmatism
- ClinicalTrials.gov ID
- NCT01763151
- Acronym / sponsor ID
- Viros_Askin
- Conditions
- Cataract, Corneal Astigmatism
- Keywords
- cataract surgery, astigmatism, opposite clear corneal incision, toric IOL, IOL rotational stability
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 55 participants (actual)
- Lead sponsor
- Vienna Institute for Research in Ocular SurgeryUniversity, hospital or other
- Study start
- Sep 2010
- Primary completion
- Aug 2012 (actual)
- Study completion
- Dec 2012 (actual)
- First posted
- 8 Jan 2013 (estimated)
- 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.
With increasing demands of patients concerning refractive outcome after cataract surgery, toric intraocular lenses (IOLs) that correct corneal astigmatism have been introduced more widely to cataract surgery. Originally toric IOLs were used mainly for patients with high degrees of astigmatism, especially after corneal surgical procedures such as penetrating keratoplasty. Since a couple of years, toric IOLs are available from numerous manufacturers to correct lower amounts of astigmatism which are much more prevalent with about 30% having a corneal astigmatism of 0.75D or more in the cataract population. This should result in less spectacle dependence of patients due to the astigmatic correction.
The alternative method to reduce corneal astigmatism as part of cataract surgery is to make incisions on the steeper axis of the cornea such as limbal relaxing incisions or an additional clear corneal incision opposite (OCCI) to the main cataract opening. These techniques are in use since more than 2 decades and are widely used in clinical routine. As with toric IOLs, precise alignment of the cuts with the axis of astigmatism is essential. The disadvantage of the incisional techniques is the variability of the effect between patients since it depends on factors such as the extent of scaring of the cuts after surgery as well as corneal thickness. The main advantage is the simplicity of the technique and the lower cost.
Aim of this study is to compare toric IOL implantation and opposite clear corneal incision during cataract surgery to correct corneal astigmatism.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, investigator)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| toric IOL | Active comparator | Device: toric IOLaspherical, toric acrylic IOL (Lentis L-312T, Oculentis, Germany) |
| IOL combined with opposite clear corneal incision (OCCI) | Active comparator | Procedure: IOL combined with opposite clear corneal incision (OCCI)aspherical, acrylic IOL with OCCI |
Who may qualify
- Ages
- 21 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Cataract
- Age 21 and older
- Regular corneal astigmatism 1.0 up to 2.5 D
- written informed consent prior to surgery
Key exclusion criteria (2 listed)
- Relevant other ophthalmic diseases such as: pseudoexfoliation, glaucoma, traumatic cataract corneal scars, and other co-morbidity that could affect capsule bag stability ( e.g. Marfan syndrome)
- Irregular corneal astigmatism on corneal topography
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 |
|---|---|---|
| toric IOLimplantation of an aspheric, toric, acrylic IOL during cataract surgery | Device | toric IOL |
| IOL combined with opposite clear corneal incision (OCCI)aspherical, acrylic IOL with opposite clear corneal incision during cataract surgery | Procedure or surgery | IOL combined with opposite clear corneal incision (OCCI) |
Primary outcome
Postoperative residual astigmatism
Time frame: 9 months post-operatively
1 secondary outcome
uncorrected distance visual acuity (UDVA)
Time frame: 9 months post-operatively
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 10 Jan 2013.
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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 Phase 4 study testing toric IOL and IOL combined with opposite clear corneal incision (OCCI) in people with Cataract and Corneal Astigmatism, run by Vienna Institute for Research in Ocular Surgery at 1 site in Austria.
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 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 10 Jan 2013. 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 Austria. 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.
What does this phase mean?
Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
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?
Postoperative residual astigmatism (time frame: 9 months post-operatively). 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 10 Jan 2013; AzTrials last refreshed its copy on 8 Nov 2026.