CClinicalTrials.gg
Status unknownNCT05626075Updated Nov 23, 2022

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

An interventional study of Using Oculus Pentacam® which is s a rotating Scheimpflug camera. The rotational measuring procedure generates Scheimpflug images in three dimensions. in Eye Change, sponsored by Sohag University. Status unknown at 1 site in Egypt. Open to participants aged 15 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-11-23.

Sponsored by Sohag University · Not applicable, Interventional, and Diagnostic

The sponsor has not verified this record recently (last verified Nov 2022), so the status shown — last known as Recruiting — may be out of date.
Phase
Not applicable
Study type
Interventional
Enrollment
100
Allocation
Randomized
Ages
15 Years and older
Sex
All
01

Study summary

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

Read the 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 .

02

Conditions studied

  • Eye Change

Keywords

  • Topographic
  • visual acuity
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In context

Lead sponsor

Sohag University is the lead sponsor of 1,183 studies on the registry; 612 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
15 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

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

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).

    1. If there was any error in reading the topographic map. 6. Patients with anemotropic refraction.
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Study design

Phase
Not applicable
Primary purpose
Diagnostic
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Participant)
Enrollment
100 participants (estimated)

Study arms

  • Experimental
    group Low Myopia

    1. Patients with low myopia aging more than 15 years old 2. All patients are with visual acuity (uncorrected, with habitual correction, and best spectacle correction). 3. There is no restrictions on the range and regularity of keratometry

    Diagnostic Test: Using Oculus Pentacam® which is s a rotating Scheimpflug camera. The rotational measuring procedure generates Scheimpflug images in three dimensions.

  • Experimental
    group high myopia

    1. Patients with high myopia aging more than 15 years old 2. All patients are with visual acuity (uncorrected, with habitual correction, and best spectacle correction). 3. There is no restrictions on the range and regularity of keratometry

    Diagnostic Test: Using Oculus Pentacam® which is s a rotating Scheimpflug camera. The rotational measuring procedure generates Scheimpflug images in three dimensions.

  • Experimental
    group Hypermetropia

    1. Patients with hypermetropia aging more than 15 years old 2. All patients are with visual acuity (uncorrected, with habitual correction, and best spectacle correction). 3. There is no restrictions on the range and regularity of keratometry

    Diagnostic Test: Using Oculus Pentacam® which is s a rotating Scheimpflug camera. The rotational measuring procedure generates Scheimpflug images in three dimensions.

  • Experimental
    group mixed astigmatism

    1. Patients with mixed astigmatism aging more than 15 years old 2. All patients are with visual acuity (uncorrected, with habitual correction, and best spectacle correction). 3. There is no restrictions on the range and regularity of keratometry

    Diagnostic Test: Using Oculus Pentacam® which is s a rotating Scheimpflug camera. The rotational measuring procedure generates Scheimpflug images in three dimensions.

Interventions

  • Diagnostic testUsing 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

    Also known as: The scheimpflug principle describes the optical imaging condition

06

What researchers measure

Primary outcomes

  1. Thickness

    Topographic values using Oculus Pentacam®

    Time frame: 3 months after begin of study

  2. degree of astigmatism in D

    Topographic values using Oculus Pentacam®

    Time frame: 3 months after begin of study

  3. maximum keratometry

    Topographic values using Oculus Pentacam®

    Time frame: 3 months after begin of study

  4. front and back elevation of the apex (um).

    Topographic values using Oculus Pentacam®

    Time frame: 3 months after begin of study

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Study locations

1 of 1 sites recruiting
  • Facultyof medicine
    Sohag, 82425, Egypt
    Recruiting
08

References and documents

Study documents

  • Study protocol · Sep 22, 2022

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 23, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT05626075
Lead sponsor
Sohag University
Responsible party
Ahmed Abdallah Abdelaal (Ophthalmology Resident at Akhemim Central hospital, Sohag University) — Principal investigator
First posted
Nov 23, 2022
Start date
Sep 22, 2022
Primary completion
Dec 2022 (estimated)
Completion
Mar 2023 (estimated)
Last update
Nov 23, 2022

Study contacts

Mohamed Iqbal, MD.PhD
Contact
dr_m_iqbal@yahoo.com
00201068559840
Mohamed Iqbal, MD.PhD
study chair · Sohag Faculty of medicine

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in Nov 2022. You cannot join it, but the record below documents what was studied.

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