Comparison of the Effect of Hydrophobic Acrylic and Silicone 3-piece IOLs on Posterior Capsule Opacification

September 5, 2013 updated by: Rupert Menapace, Medical University of Vienna

Age-related cataract is the main cause of impaired vision in the elderly population worldwide.

The only treatment that can restore functional visual ability is cataract surgery where the opacified crystalline lens is removed by phacoemulsification and an artificial intraocular lens is implanted into the remaining capsular bag. Cataract operations are generally very successful, with a low risk of serious complications.

The most common reason for impaired vision after uneventful cataract surgery in otherwise healthy eyes is the development of posterior capsule opacification (PCO). PCO is a physiological change (thickening, opacification and clouding) of the capsular bag expected after cataract surgery, because the lens epithelial cells (LECs) undergo hyperplasia and cellular migration. PCO is treated with Nd:YAG capsulotomy, a quick outpatient procedure that uses a laser to open a central hole in the posterior capsular bag.

Modifications in IOL design and material lead to a decrease in the incidence of PCO.

During the past two decades, refinements in surgical technique were made resulting in today's small incision phacoemulsification surgery. Nowadays a multitude of microincision IOLs are available, many of them similar but of course with some differences in regard to the chemical composition of the acrylic material and the IOL design.

The purpose of this study is to compare the development of posterior capsule opacification (PCO) and the frequency of treatment between two different microincision IOLs over a period of 2 years.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

50

Phase

  • Not Applicable

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

  • Austria
      • Vienna, Austria, 1090
        • Department of Ophthalmology and Optometry of the Medical University Vienna

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 90 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • bilateral age-related cataract
  • good overall physical constitution

Exclusion Criteria:

  • previous intraocular surgery or ocular trauma
  • intraocular complication like posterior capsular tear
  • glaucoma
  • uveitis
  • corneal diseases, diabetic retinopathy and any other severe retinal -pathology that would make a postoperative visual acuity of 20/40 (decimal equivalent = 0.5) or better unlikely

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

  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Other: acrylic 3-piece IOL
same-day bilateral cataract surgery with implantation of intraocular lens Domilens KS-XS in one eye
Procedure: bilateral cataract surgery
same-day bilateral cataract surgery with implantation of intraocular lens
Other: silicone 3-piece IOL
same-day bilateral cataract surgery with implantation of intraocular lens Domilens KS-3Ai in one eye
Procedure: bilateral cataract surgery
same-day bilateral cataract surgery with implantation of intraocular lens

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
posterior capsular opacification (PCO)
Time Frame: 2 xears
subjective and objective PCO scoring
2 xears

Secondary Outcome Measures

Outcome Measure
Time Frame
best corrected visual acuity (BCVA)
Time Frame: 2 years
2 years
Nd:YAG rate
Time Frame: 2 years
2 years

Collaborators and Investigators

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

Sponsor

Medical University of Vienna

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

March 1, 2011

Primary Completion (Actual)

March 1, 2011

Study Completion (Actual)

August 1, 2011

Study Registration Dates

First Submitted

September 3, 2013

First Submitted That Met QC Criteria

September 5, 2013

First Posted (Estimate)

September 6, 2013

Study Record Updates

Last Update Posted (Estimate)

September 6, 2013

Last Update Submitted That Met QC Criteria

September 5, 2013

Last Verified

September 1, 2013

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • EK Nr: 112/2011

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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