Visual Performance With a Trifocal Intraocular Lens

May 25, 2012 updated by: Elizabeth Agrippa, BMI Southend Hospital

Visual Performance Adn Quality of Vision Evaluation After Implantation of a Trifocal Intraocular Lens

The purpose of this study is to evaluate the visual performance of a trifocal intraocular lens at distance, near and intermediate viewing, by way of visual acuity measurement, contrast sensitivity.

Patient satisfaction and quality of vision will also be assessed by way of a questionnaire.

Study Overview

Status

Unknown

Conditions

Detailed Description

Monocular and Binocular Unaided (UCVA) and Best Corrected Visual Acuity (BCVA) will be measured at 6m in LogMAR units under photopic conditions (85cd/m2).

Subjective Refraction will be performed to establish any residual refractive error will for distance, intermediate and near.

Defocus Profiles (visual acuity over imposed defocus) are measured for each patient. The patient observes the 6m LogMAR chart through best distance correction, then defocusing is achieved by the addition of pairs of lenses from +2.00D to -4.00D in 0.50D steps.. The LogMAR acuity will be recorded and the data plotted.

Contrast Sensitivity will be evaluated monocularly under photopic (85cd/m2) conditions and mesopic (4cd/m2) using the Pelli-Robson Contrast Sensitivity Chart.

Near and intermediate performance will be evaluated using the Radner Reading Charts to assess acuity (LogRAD units) and reading speed in photopic conditions 85cd/m2

Study Type

Observational

Enrollment (Anticipated)

30

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

  • United Kingdom
    • Essex
      • Westclifff-on-Sea, Essex, United Kingdom, SS0 9AG
        • BMI Southend Hospital

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

40 years to 70 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

Patients from a private ophthalmology clinic

Description

Inclusion Criteria:

  • Age 40-70yrs
  • Bilateral implantation of a trifocal intraocular lens

Exclusion Criteria:

  • existing ocular pathology
  • surgical complications
  • corneal astigmatism > 1.50DC

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

Collaborators and Investigators

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

Sponsor

BMI Southend Hospital

Investigators

  • Principal Investigator: Elizabeth M Agrippa, BSc, BMI Southend

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

June 1, 2012

Primary Completion (Anticipated)

July 1, 2013

Study Completion (Anticipated)

August 1, 2013

Study Registration Dates

First Submitted

May 22, 2012

First Submitted That Met QC Criteria

May 23, 2012

First Posted (Estimate)

May 24, 2012

Study Record Updates

Last Update Posted (Estimate)

May 30, 2012

Last Update Submitted That Met QC Criteria

May 25, 2012

Last Verified

May 1, 2012

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • TRI 1.1

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

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Kuwait

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Subscribe