Visual Outcomes After Implantation of a New Multifocal Intraocular Lens

January 6, 2012 updated by: PATRICK FRENSEL DE MORAES TZELIKIS, Hospital Oftalmologico de Brasilia

Visual Outcomes After Implantation of a New Refractive Toric Multifocal Intraocular Lens

This prospective nonrandomized study comprised patients with cataract, corneal astigmatism, and motivation for spectacle independence. In all cases, a Rayner M-flex® T toric Intraocular Lens will be implanted in the capsular bag. Three months postoperatively, distance, intermediate, and near visual acuities; spherical equivalent; residual refractive astigmatism; defocus curve; and contrast sensitivity will be evaluated. A patient-satisfaction and visual phenomena questionnaire will also be administered.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Postoperative evaluation was performed at 3 months. The uncorrected and corrected distance visual acuity were assessed using the 100% contrast Early Treatment Diabetic Retinopathy Study chart, uncorrected intermediate visual acuity at 70 cm, and uncorrected near visual acuity at 40 cm; a binocular defocus curve was constructed using the ETDRS chart at 4 m and adding to the patient's manifest refraction +2.50 to -5.00 D sphere in 0.50 increments. The cylinder axis of the Intraocular lens (IOL) was measured at the slitlamp using the beam protractor after full mydriasis. The mean of the absolute values of degrees the intraocular lens was off axis was determined.

Contrast sensitivity was measured using the CSV-1000 HGT instrument (VectorVision, Inc.), which presents a translucent chart divided into 4 cycles with spatial frequencies of 3, 6, 12 and 18 cycles per degree. The background illumination of the translucent chart does not depend on room lighting. All measurements were obtained under mesopic (5 cd/m2) and photopic (85 cd/m2) conditions. The examinations were performed unilaterally at a distance of 2.5 m with Best-corrected visual acuity (BCVA) and an undilated pupil. All measurements were performed under the same conditions.

Patient satisfaction and quality of life were assessed by a simple questionnaire. Patients were interviewed 3 months postoperative. Patients were asked about visual disturbances, visual lifestyle activities, spectacle use, and satisfaction with the procedure.

Study Type

Interventional

Enrollment (Actual)

40

Phase

  • Phase 4

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

  • Brazil
    • DF
      • Brasilia, DF, Brazil, 70200670
        • Hospital Oftalmologico Brasilia

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

55 years to 85 years (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Cataract
  • Any race
  • Either gender
  • Diagnosis of cataracts both eyes
  • Pre-existing physical conditions that could skew visual results, such as Diabetes, Retinal detachment, Macular degeneration, or Cancer
  • Subjects must have > 1.00 diopter of astigmatism

Exclusion Criteria:

  • Central endothelial cell count less than 2000 cells/mm2 glaucoma or intraocular pressure greater than 21 mmHg amblyopia
  • Retinal abnormalities
  • Diabetes mellitus steroid or immunosuppressive treatment
  • Connective tissue diseases

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: NA
  • Interventional Model: SINGLE_GROUP
  • Masking: NONE

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
NO_INTERVENTION: Toric
Multifocal Toric IOL implantation
Device: Multifocal Intraocular Lens (RAYNER M-FLEX T TORIC IOL)
Multifocal IOL implantation
Other Names:
  • RAYNER M-FLEX T TORIC IOL

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Visual Performance After Implantation of a Toric Multifocal Refractive Intraocular Lens
Time Frame: 3 months postoperative
Postoperative evaluation will be performed at 3 months. The uncorrected distance visual acuity (UDVA) and corrected distance visual acuity (CDVA) will be assessed using the 100% contrast ETDRS chart; a binocular defocus curve will be constructed using the ETDRS chart at 4 m.
3 months postoperative

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Contrast sensitivity
Time Frame: 3 months
Contrast sensitivity will be measured using the CSV-1000 HGT instrument (VectorVision, Inc.), which presents a translucent chart divided into 4 cycles with spatial frequencies of 3, 6, 12 and 18 cycles per degree (cpd). The background illumination of the translucent chart does not depend on room lighting. All measurements will be obtained under mesopic (5 cd/m2) and photopic (85 cd/m2) conditions. The examinations will be performed unilaterally at a distance of 2.5 m with BCVA and an undilated pupil. All measurements will be performed under the same conditions.
3 months
Patient satisfaction
Time Frame: 3 months
Patient satisfaction and quality of life will be assessed by a simple questionnaire. Patients will be interviewed 3 months postoperative. Patients will be asked about visual disturbances, visual lifestyle activities, spectacle use, and satisfaction with the procedure.
3 months

Collaborators and Investigators

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

Sponsor

Hospital Oftalmologico de Brasilia

Collaborators

University of Sao Paulo

Investigators

  • Principal Investigator: PATRICK F TZELIKIS, MD, PhD, Hospital Oftalmologico Brasilia

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, 2011

Primary Completion (ACTUAL)

November 1, 2011

Study Completion (ACTUAL)

January 1, 2012

Study Registration Dates

First Submitted

January 3, 2012

First Submitted That Met QC Criteria

January 6, 2012

First Posted (ESTIMATE)

January 9, 2012

Study Record Updates

Last Update Posted (ESTIMATE)

January 9, 2012

Last Update Submitted That Met QC Criteria

January 6, 2012

Last Verified

January 1, 2012

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • HOB05
  • HOBBrasilia05 (OTHER: HOBBrasilia05)

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.

Clinical Trials on Cataract

Clinical Trials on Multifocal Intraocular Lens (RAYNER M-FLEX T TORIC IOL)

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Mauritius

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Subscribe