Visual Performance With a Trifocal Intraocular Lens

This study is not yet open for participant recruitment.
Verified May 2012 by BMI Southend Hospital
Sponsor:
Information provided by (Responsible Party):
Elizabeth Agrippa, BMI Southend Hospital
ClinicalTrials.gov Identifier:
NCT01605058
First received: May 22, 2012
Last updated: May 25, 2012
Last verified: May 2012
  Purpose

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.


Condition
Cataract

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Retrospective
Official Title: Visual Performance Adn Quality of Vision Evaluation After Implantation of a Trifocal Intraocular Lens

Resource links provided by NLM:


Further study details as provided by BMI Southend Hospital:

Estimated Enrollment: 30
Study Start Date: June 2012
Estimated Study Completion Date: August 2013
Estimated Primary Completion Date: July 2013 (Final data collection date for primary outcome measure)
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

  Eligibility

Ages Eligible for Study:   40 Years to 70 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Sampling Method:   Probability Sample
Study Population

Patients from a private ophthalmology clinic

Criteria

Inclusion Criteria:

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

Exclusion Criteria:

  • existing ocular pathology
  • surgical complications
  • corneal astigmatism > 1.50DC
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT01605058

Locations
United Kingdom
BMI Southend Hospital Not yet recruiting
Westclifff-on-Sea, Essex, United Kingdom, SS0 9AG
Contact: Elizabeth Agrippa    07795176257    elizabeth.agrippa@gmail.com   
Sponsors and Collaborators
BMI Southend Hospital
Investigators
Principal Investigator: Elizabeth M Agrippa, BSc BMI Southend
  More Information

No publications provided

Responsible Party: Elizabeth Agrippa, Optometrist, BMI Southend Hospital
ClinicalTrials.gov Identifier: NCT01605058     History of Changes
Other Study ID Numbers: TRI 1.1
Study First Received: May 22, 2012
Last Updated: May 25, 2012
Health Authority: United Kingdom: National Health Service

Additional relevant MeSH terms:
Cataract
Lens Diseases
Eye Diseases

ClinicalTrials.gov processed this record on April 16, 2014