Intrastromal Corneal Ring Segments and Toric Phakic Posterior Intra-ocular Lenses Implantation in Keratoconus

September 21, 2021 updated by: Ahmed Maher Khalafallah, Minia University

"Comparison Between Intrastromal Corneal Ring Segments and Toric Phakic Posterior Intra-ocular Lenses Implantation in Keratoconus"

To compare visual and refractive measurements of intrastromal corneal ring segments versus toric phakic posterior intra-ocular lenses implantation in keratoconus

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

  • The study is a prospective comparative interventional case series. It will be conducted in Minia university hospital and Roaa Laser Vision Correction Center.
  • Fourty eyes will be evenly allocated into two groups:

Group (A): 20 eyes will undergo corneal collagen cross linking (epithelium off) 1 month after Femtosecond laser assisted intrastromal corneal keraring segments.

Group (B): 20 eyes will undergo toric phakic posterior IOL implantation 1 year after corneal collagen cross linking (epithelium off).

• An informed written consent to be involved in the study will be obtained from each patient.

Study Type

Interventional

Enrollment (Anticipated)

40

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 Contact

Study Locations

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

21 years to 40 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Keratoconus grade I to III according to the Amsler-Krumeich classification

Exclusion Criteria:

  • Acute hydrops or grade IV keratoconus
  • Any ocular diseases or surgeries
  • Corneal thickness less than 400 µm at the thinnest corneal point, and at least 450 µm at the incision site for ICRS group
  • Corneal pacities

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: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: corneal collagen cross linking and intrastromal corneal keraring segments.
20 eyes will undergo corneal collagen cross linking (epithelium off) 1 month after Femtosecond laser assisted intrastromal corneal keraring segments
Other: corneal ring segments
ring hard segments inserted within corneal stroma using femtolaser
Other Names:
  • toric phakic posterior IOL implantation/ corneal collagen cross linking
Active Comparator: toric phakic posterior IOL implantation and corneal collagen cross linking
20 eyes will undergo toric phakic posterior IOL implantation 1 year after corneal collagen cross linking (epithelium off).
Other: corneal ring segments
ring hard segments inserted within corneal stroma using femtolaser
Other Names:
  • toric phakic posterior IOL implantation/ corneal collagen cross linking

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
pentacam readings
Time Frame: 1 month
a device that read topometric corneal data and other data
1 month

Collaborators and Investigators

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

Sponsor

Minia University

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 (Actual)

November 28, 2019

Primary Completion (Anticipated)

November 15, 2021

Study Completion (Anticipated)

November 22, 2021

Study Registration Dates

First Submitted

March 25, 2021

First Submitted That Met QC Criteria

September 21, 2021

First Posted (Actual)

September 24, 2021

Study Record Updates

Last Update Posted (Actual)

September 24, 2021

Last Update Submitted That Met QC Criteria

September 21, 2021

Last Verified

September 1, 2021

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 324 : 11/2019

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

No

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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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