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Visual Performance With a Trifocal Intraocular Lens

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified May 2012 by Elizabeth Agrippa, BMI Southend Hospital.
Recruitment status was:  Not yet recruiting
Information provided by (Responsible Party):
Elizabeth Agrippa, BMI Southend Hospital Identifier:
First received: May 22, 2012
Last updated: May 25, 2012
Last verified: May 2012

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 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

Further study details as provided by Elizabeth Agrippa, 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


Ages Eligible for Study:   40 Years to 70 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Probability Sample
Study Population
Patients from a private ophthalmology clinic

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
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01605058

United Kingdom
BMI Southend Hospital Not yet recruiting
Westclifff-on-Sea, Essex, United Kingdom, SS0 9AG
Contact: Elizabeth Agrippa    07795176257   
Sponsors and Collaborators
BMI Southend Hospital
Principal Investigator: Elizabeth M Agrippa, BSc BMI Southend
  More Information

Responsible Party: Elizabeth Agrippa, Optometrist, BMI Southend Hospital Identifier: NCT01605058     History of Changes
Other Study ID Numbers: TRI 1.1
Study First Received: May 22, 2012
Last Updated: May 25, 2012

Additional relevant MeSH terms:
Lens Diseases
Eye Diseases processed this record on September 21, 2017