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

Unknown

Conditions

Intervention / Treatment

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

Interventional

Enrollment (Actual)

75

Phase

  • 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

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
Intervention / Treatment
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

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

LensAR Incorporated

Investigators

  • 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

October 1, 2008

Primary Completion (Actual)

October 1, 2009

Study Completion (Anticipated)

April 1, 2011

Study Registration Dates

First Submitted

October 22, 2009

First Submitted That Met QC Criteria

October 22, 2009

First Posted (Estimate)

October 23, 2009

Study Record Updates

Last Update Posted (Estimate)

April 15, 2011

Last Update Submitted That Met QC Criteria

April 14, 2011

Last Verified

April 1, 2011

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID 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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