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Correlation between the Limbus-Insertion Distance of the Lateral Rectus Muscle and Lateral Rectus Recession Surgery in Intermittent Exotropia (Benha University)
Egypt (IFMSA-Egypt) - Benha Faculty of medicine, Benha
Prof. Dr. Mohamed F. Farid
Dr. Mohamed A. Awwad
Type of Research Project
- Clinical Project without Laboratory work
What is the background of the project?
Intermittent exotropia (IXT) is one of the most common types of childhood strabismus. Although IXT is the most convenient common form of exotropia, some aspects of the natural course of IXT remain obscure and exotropic drift frequently occurs after surgery. It was previously accepted that an initial overcorrection for IXT may result in a better surgical outcome; however, it is challenging to predict postoperative outcomes after recession surgery. Therefore, knowledge of the factors affecting postoperative outcome in IXT is important for surgical planning and patient counseling. There have been many studies attempting to predict surgical outcomes in patients with IXT. Although various factors have been considered as predictive indicators, to the best of our knowledge, the limbus-insertion distance (LID) of the extraocular muscle has never been investigated as a predictor of surgical outcomes in patients with IXT. Therefore, this project will focus on the LID of the lateral rectus (LR) muscle and the postoperative effect of recession surgery in IXT.
What is the aim of the project?
To investigate whether the limbus-insertion distance (LID) of the lateral rectus (LR) muscle can be a useful indicator for predicting the surgical effect of recession surgery in intermittent exotropia (IXT).
What techniques and methods are used?
• Diagnose cases with Intermittent Exotropia. • Measure angle of squint before and after surgery. • Measure visual acuity before and after surgery • Intra operative assessment of lateral rectus muscle limbal insertion distance. • Measure fusion status. • Assess ocular motility. • Assess patient’s refraction. • This is a prospective uncontrolled study. • Postoperative follow up and assessment. • Statistical analysis of the data.
What is the role of the student?
- The student will observe the practical experiments but will be highly involved in the analysis of the results
- If the project is clinical
- the student will take active part in the clinical examination
- If the project is clinical
- the student will be allowed to work with patients
- The tasks will be done under supervision
What are the tasks expected to be accomplished by the student?
• Attend the squint outpatient clinic. • Share in data collection: - Measure visual acuity for patient before and after surgery. - Take history from patients - Measure fusion status - Assess ocular motility - Assess patient’s refraction • Attend the surgery as an observer • Follow up patients. • Participate in data analysis that will be carried out using Statistical Package for Social Sciences 25 software
Will there be any theoretical teaching provided (preliminary readings, lectures, courses, seminars etc)
The tutor will provide the student with brief tutorials about squint in clinical and surgical management
What is expected from the student at the end of the research exchange? What will be the general outcome of the student?
- The student will prepare a poster - The student will prepare a presentation - The student will prepare a scientific report
What skills are required of the student? Is there any special knowledge or a certain level of studies needed?
• Basic skills in history taking • Basic clinical ophthalmology skills e.g. (measuring visual acuity)
Are there any legal limitations in the student’s involvement
Type of students accepted
This project accepts: - Medical students - Graduated students (less than 6 months)
- Lee JY; Lee EJ; Park KA; Oh SY. Correlation between the limbus insertion distance of the lateral rectus muscle and lateral rectus recession surgery in intermittent exotropia. PloS One 2016; 11:e0160263
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