Corneal Topography in Vernal Keratoconjunctivitis

December 19, 2024 updated by: Monica Basem Fayez, Assiut University

the Effect of Vernal Keratoconjunctivitis on Corneal Topographic Profiles

To evaluate the corneal topographic changes in VKC patients using Pentacam and prevalence of KC development in VKC.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Detailed Description

Vernal keratoconjunctivitis (VKC) is a chronic allergic disease, with seasonal periods of exacerbation.VKC is characterized by itching, photophobia. white mucous discharge, lacrimation, foreign body sensation, and pain due to corneal involvement of shield ulcers. Corneal involvement in VKC involves injury to the superficial and basal epithelial layers and anterior stroma . Excessive eye rubbing and a slow release of matrix metalloproteinases penetrate the cornea in presence of chronic epithelial damage causing astigmatism and corneal ectasia . These changes may be undetected until advanced complications such as keratoconus(KC) with thinning and protrusion of cornea leading to myopia and astigmatism . These changes can be measured accurately by corneal topography, making it the gold standard in the screening of keratoconus and other corneal ectasias . Corneal topography is a method of computer-assisted examination of the cornea in which multiple concentric light rings are projected on cornea. Changes in corneal topography indices to be studied include changes in effective refeactivepower ,asphericity , corneal asymmetry index and visual performance . It is a non-invasive exploratory technique to analyse both qualitatively and quantitatively the morphology of the cornea . The Penta Cam is a cornea and anterior segment topography device, based on a rotating Scheimpflug camera. Its optical cross-sectional analysis that helps in imaging of anterior and posterior corneal surfaces which provides with fullpachymetric map and many other data such as corneal aberrometry and densitometry that allow early detection of ectasia.

Study Type

Observational

Enrollment (Estimated)

44

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 Contact Backup

  • Name: dalia mohamed mohamed, professer
  • Phone Number: +201223212962

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

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

patients will be selected from primary clinic

Description

Inclusion Criteria:

clinical diagnosis of vernal keratoconjunctivitis -

Exclusion Criteria:

patients with corneal disease as corneal opacity, corneal dystrophy or degenerative changes patients with previous corneal surgery patients with ocular trauma.

-

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

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
evaluate the corneal topographic changes in VKC patients using Pentacam
Time Frame: 1 year
1 year

Secondary Outcome Measures

Outcome Measure
Time Frame
prevalence of KC development in VKC
Time Frame: 1 year
1 year

Collaborators and Investigators

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

Sponsor

Assiut University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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 (Estimated)

June 1, 2025

Primary Completion (Estimated)

December 1, 2026

Study Completion (Estimated)

December 1, 2026

Study Registration Dates

First Submitted

December 16, 2024

First Submitted That Met QC Criteria

December 19, 2024

First Posted (Actual)

March 25, 2025

Study Record Updates

Last Update Posted (Actual)

March 25, 2025

Last Update Submitted That Met QC Criteria

December 19, 2024

Last Verified

December 1, 2024

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • corneal topography in vkc

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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