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Lees Screen in Concomitant Strabismus

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT04213053
Recruitment Status : Recruiting
First Posted : December 30, 2019
Last Update Posted : June 11, 2020
Information provided by (Responsible Party):
Mohamed Farag Khalil Ibrahiem, Minia University

Brief Summary:
Preoperative and postoperative Lees screen was done after concomitant horizontal strabismus surgery to detect any limitation in the field of operated muscle

Condition or disease Intervention/treatment Phase
Strabismus Procedure: strabismus surgery Not Applicable

Detailed Description:
Preoperative and postoperative Lees screen was done for concomitant esotropia and exotropia patients to record any change in ocular motility as regards underaction or overaction in the operated extra ocular muscles

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 24 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Intervention Model Description: detect if there are any change in motility after concomitant horizontal muscle surgery
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: Changes in Range of Ocular Motility Following Horizontal Rectus Muscle Surgery in Concomitant Strabismus; a Quantitate Measurements Using Lees Screen
Actual Study Start Date : October 1, 2019
Estimated Primary Completion Date : December 30, 2020
Estimated Study Completion Date : February 1, 2021

Arm Intervention/treatment
Concomitant strabismus patients
Horizontal strabismus surgery
Procedure: strabismus surgery
Lees screen before and after concomitant strabismus surgery

Primary Outcome Measures :
  1. postoperative Lees screen [ Time Frame: 3 months ]
    detect any restriction in muscle field

Information from the National Library of Medicine

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Ages Eligible for Study:   10 Years to 40 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Concomitant esotropia
  • Concomitant exotropia
  • Above 10 years old patients

Exclusion Criteria:

  • Restrictive and paralytic strabismus
  • Previous strabismus surgery
  • Mental disability

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT04213053

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Contact: Mohamed F Ibrahiem, MD 00201064311860
Contact: Sahar T Abelaziz, MD 00201065716074

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Faculty of Medicine Recruiting
Minya, Minia, Egypt, 61111
Contact: Mohamed FK Ibrahiem, MD    00201064311860   
Sponsors and Collaborators
Minia University
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Principal Investigator: Sahar TA Abdelaziz, MD Minia University
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Responsible Party: Mohamed Farag Khalil Ibrahiem, Assistant Professor, Minia University Identifier: NCT04213053    
Other Study ID Numbers: Paediatric ophthalmology unit
First Posted: December 30, 2019    Key Record Dates
Last Update Posted: June 11, 2020
Last Verified: June 2020

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Additional relevant MeSH terms:
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Ocular Motility Disorders
Cranial Nerve Diseases
Nervous System Diseases
Eye Diseases