Correlation Between Corneal Topographic Patterns and Refractive Status Of The Eye in Sohag City,Egypt

Overview

To evaluate corneal topographic pattern & its correlation with refractive status of the eye .

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Parallel Assignment
    • Primary Purpose: Diagnostic
    • Masking: Single (Participant)
  • Study Primary Completion Date: December 2022

Detailed Description

This study will be established in The Future Center for refractive surgery, Sohag, Egypt. This study will include 100 eyes of patients aged over 15 years. All patients were subjected to topography imaging. Using Oculus Pentacam® which is s a rotating Scheimpflug camera. The rotational measuring procedure generates Scheimpflug images in three dimensions. The scheimpflug principle describes the optical imaging condition when the plane of an object is not parallel to the film of the camera and has to cut each other in one line or one point of intersection with the advantage to achieve wide depth of focus. Scheimpflug imaging attains a wide and high depth-of-focus , providing sharp images that include information from an anterior corneal surface through to the posterior crystalline capsule; this depends mainly on media transparency and pupil size .

Interventions

  • Diagnostic Test: Using Oculus Pentacam® which is s a rotating Scheimpflug camera. The rotational measuring procedure generates Scheimpflug images in three dimensions.
    • Scheimpflug imaging attains a wide and high depth-of-focus , providing sharp images that include information from an anterior corneal surface through to the posterior crystalline capsule

Arms, Groups and Cohorts

  • Experimental: group Low Myopia
    • Patients with low myopia aging more than 15 years old All patients are with visual acuity (uncorrected, with habitual correction, and best spectacle correction). There is no restrictions on the range and regularity of keratometry
  • Experimental: group high myopia
    • Patients with high myopia aging more than 15 years old All patients are with visual acuity (uncorrected, with habitual correction, and best spectacle correction). There is no restrictions on the range and regularity of keratometry
  • Experimental: group Hypermetropia
    • Patients with hypermetropia aging more than 15 years old All patients are with visual acuity (uncorrected, with habitual correction, and best spectacle correction). There is no restrictions on the range and regularity of keratometry
  • Experimental: group mixed astigmatism
    • Patients with mixed astigmatism aging more than 15 years old All patients are with visual acuity (uncorrected, with habitual correction, and best spectacle correction). There is no restrictions on the range and regularity of keratometry

Clinical Trial Outcome Measures

Primary Measures

  • Thickness
    • Time Frame: 3 months after begin of study
    • Topographic values using Oculus Pentacam®
  • degree of astigmatism in D
    • Time Frame: 3 months after begin of study
    • Topographic values using Oculus Pentacam®
  • maximum keratometry
    • Time Frame: 3 months after begin of study
    • Topographic values using Oculus Pentacam®
  • front and back elevation of the apex (um).
    • Time Frame: 3 months after begin of study
    • Topographic values using Oculus Pentacam®

Participating in This Clinical Trial

Inclusion Criteria

  • Patients aging more than 15 years old – All patients are with visual acuity (uncorrected, with habitual correction, and best spectacle correction). – There is no restrictions on the range and regularity of keratometry. Exclusion Criteria:

  • Patients with a history of any trauma to the eye. – Patients with recent contact lens wear. – history of ocular surgery . – Patients with distance corrected visual acuity or abnormal retinoscopy examination (e.g., scissoring reflex). 5. If there was any error in reading the topographic map. 6. Patients with anemotropic refraction.

Gender Eligibility: All

Minimum Age: 15 Years

Maximum Age: N/A

Are Healthy Volunteers Accepted: Accepts Healthy Volunteers

Investigator Details

  • Lead Sponsor
    • Sohag University
  • Provider of Information About this Clinical Study
    • Principal Investigator: Ahmed Abdallah Abdelaal, Ophthalmology Resident at Akhemim Central hospital – Sohag University
  • Overall Official(s)
    • Mohamed Iqbal, MD.PhD, Study Chair, Sohag Faculty of medicine
  • Overall Contact(s)
    • Mohamed Iqbal, MD.PhD, 00201068559840, dr_m_iqbal@yahoo.com

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