Assessing eye movement changes after strabismus surgery

Changes in Range of Ocular Motility Following Horizontal Rectus Muscle Surgery in Concomitant Strabismus; a Quantitate Measurements Using Lees Screen

NA · Minia University · NCT04213053

This study tests how strabismus surgery affects eye movements in people with crossed or turned eyes to see if it improves their vision and muscle function.

Quick facts

PhaseNA
Study typeInterventional
Enrollment24 (estimated)
Ages10 Years to 40 Years
SexAll
SponsorMinia University (other)
Locations1 site (Minya, Minia)
Trial IDNCT04213053 on ClinicalTrials.gov

What this trial studies

This study evaluates the effects of strabismus surgery on ocular motility by conducting preoperative and postoperative Lees screen assessments in patients with concomitant esotropia and exotropia. The goal is to identify any limitations in the field of the operated muscle and to record changes in muscle function. By analyzing the results, the study aims to improve surgical outcomes and patient care in strabismus management.

Who should consider this trial

Good fit: Ideal candidates for this study are patients over 10 years old diagnosed with concomitant esotropia or exotropia.

Not a fit: Patients with restrictive or paralytic strabismus, those who have previously undergone strabismus surgery, or individuals with mental disabilities may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could enhance the understanding of surgical impacts on eye movement, leading to better treatment strategies for strabismus patients.

How similar studies have performed: While there may be existing studies on strabismus surgery, this specific approach using the Lees screen for assessing ocular motility changes is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

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

Exclusion Criteria:

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

Where this trial is running

Minya, Minia

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Strabismus

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.