Laser Treatment of the Crystalline Lens

April 14, 2011 updated by: LensAR Incorporated

A Prospective Single-Center Clinical Trial to Evaluate the Feasibility of Laser Treatment of the Crystalline Lens in Subjects Having Elected to Undergo Lens Extraction and Intraocular Lens Implantation

The use of a femtosecond laser in cataract surgery that gives equivalent or improved results comapred to conventional phaco-emulsification surgery.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Unknown

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The objective of this study is to evaluate the feasibility of the LensAR laser system to surgically intervene within the crystalline lens. The primary goal of this initial study is to establish safety parameters as compared with conventional phacoemulsification procedures, and to evaluate the ability to provide an accurate and consistent anterior capsular opening (capsulotomy).

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
75

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2
  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Mexico
      • Mexico City, Mexico, DF 04030
        • Asociacion Para Evitar La Cuguera en Mexico IAP

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Subjects must sign and be given a copy of the written informed consent form.
  • Subjects must have elected to undergo lens extraction and foldable monofocal IOL implantation (ideally of the same type), and then elect to have the LensAR laser surgery.
  • Subjects must be willing and able to return for scheduled follow-up examinations for a minimum of 12 months after surgery.
  • Central 8 mm of clear cornea without vascularization.

Exclusion Criteria:

  • Subjects with prior anterior segment or vitreo-retinal surgical intervention in the eye to be treated.
  • Subjects with lenticular cataracts with nuclear grading greater than Grade 4 on the LOCS III scale.
  • Subjects who cannot attain ocular dilation of 7.0 mm.
  • Subjects with anterior segment pathology in the eye to be treated that is not directly improved by lens extraction and IOL implantation.
  • Subjects with residual, recurrent, active ocular or uncontrolled eyelid disease or any corneal abnormalities (including endothelial dystrophy, guttata, recurrent corneal erosion, etc.) in the eye to be treated.
  • Subjects with ophthalmoscopic signs of keratoconus (or keratoconus suspect) in the eye to be treated.
  • Subjects with a history of severe dry eye not responding to therapy.
  • Subjects with macular degeneration, history of retinal detachment, or any other fundus findings that would pose a risk to safety or an acceptable visual outcome in the eye to be treated.
  • Subjects with a history of herpes zoster or herpes simplex keratitis.
  • Subjects who have a history of steroid-responsive rise in intraocular pressure, glaucoma, or are a glaucoma suspect.
  • Subjects with diabetic retinopathy, autoimmune disease, connective tissue disease, pseudoexfoliation syndrome, or clinically significant atopic syndrome.
  • Subjects on chronic systemic corticosteroids or other immunosuppressive therapy that may affect wound healing, and any immuno-compromised subjects.
  • Subjects who are using ophthalmic medication(s) other than artificial tears for treatment of ocular pathology including ocular allergy.
  • Subjects using systemic medications with significant ocular side effects.
  • Subjects who are pregnant, lactating, or of child-bearing potential and not practicing a medically approved method of birth control.
  • Subjects with known sensitivity to planned study concomitant medications.
  • Subjects who are participating in any other ophthalmic drug or device clinical trial during the time of this clinical investigation.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Laser treated
Eye treated with LensAR Laser System
Device: LensAR laser surgery
Use of laser for cataract surgery
Other Names:
  • LensAR Laser System
Active Comparator: Control Eye
Contralateral eye treated with conventional phaco-emulsification
Device: Phaco-emulsification cataract surgery
Phaco-emulsification cataract surgery
Other Names:
  • Exact equipment varies

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Capsulotomy a. Ease of opening b. Achievement of intended shape and size
Time Frame: Time of Surgery
Time of Surgery
Lens removal a. Ease of irrigation / aspiration (time) b. Reduced ultrasound phacoemulsification
Time Frame: Time of surgery
Time of surgery
Posterior capsule rupture < 10% occurrence rate
Time Frame: Time of Surgery
Time of Surgery
Less than 5% of eyes should lose more than two lines of BSCVA
Time Frame: 3 months post-operative
3 months post-operative

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
LensAR Incorporated

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Ramon Naranjo, MD, Asociación para Evitar la Ceguera en Mexico IAP
  • Principal Investigator: Jorge VIllar, MD, Asociación para Evitar la Ceguera en Mexico IAP

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
October 1, 2008

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
October 1, 2009

Study Completion (Anticipated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
April 1, 2011

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
October 22, 2009

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 22, 2009

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
October 23, 2009

Study Record Updates

Last Update Posted (Estimate)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
April 15, 2011

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 14, 2011

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
April 1, 2011

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 52-00001-0000

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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