Effect of Intracorneal Ring Segments on Posterior Corneal Tomography in Eyes With Keratoconus

Not Applicable

Completed

• Conditions: Keratoconus; Keratoconus Posterior
• Interventions: Procedure: Intracorneal ring segment implantation

• Registration Number: NCT04748198
• Lead Sponsor: Ain Shams University

Brief Summary

Our purpose is to analyze the changes induced in the posterior corneal surface in patients implanted with intracorneal ring segments for treatment of keratoconus. Patients are assessed with corneal imaging device preoperatively and at 1, 3, 6 and 12 months postoperatively.

Detailed Description

Procedure: Femtosecond laser assisted implantation of intracorneal ring segments in keratoconus patients Uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), refraction, keratometric (K) readings of the anterior and posterior surface, corneal asphericity (Q value) of the anterior and posterior surface, and anterior and posterior elevations are evaluated using a corneal imaging device preoperatively and at 1, 3, 6 and 12 months after surgery.

Study Timeline

• Study Start: 2018-06-10
• Primary Completion: 2020-06-15
• Study Completion: 2020-06-15
• Study First Submitted: 2021-01-31
• Status Verified: 2021-02
• Study First Submitted QC: 2021-02-05
• Last Update Submitted: 2021-02-05
• Study First Posted: 2021-02-10
• Last Update Posted: 2021-02-10

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 60

Inclusion Criteria

Not provided

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Exclusion Criteria

Not provided

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Study group	Intracorneal ring segment implantation	Intracorneal ring segments are implanted for treatment of keratoconus, and posterior corneal surface is assessed preoperatively and postoperatively.

Primary Outcome Measures

Name	Time	Method
Posterior corneal astigmatism	Baseline to 12 months	It is measured by corneal imaging device preoperatively and postoperatively

Secondary Outcome Measures

Name	Time	Method
Visual Acuity	Baseline to 12 months	It is measured by Snellen Chart Acuity

Trial Locations

Locations (1)

Ain Shams University; 🇪🇬 Cairo, Egypt