Lateral Rectus Muscle and Anterior Segment Optical Coherence Tomography (AS-OCT) in Two Recession Surgeries

• Conditions: Intermittent Exotropia

• Registration Number: NCT02450162
• Lead Sponsor: Samsung Medical Center

Brief Summary

* Background and study aims : The investigators conducted this study to compare the movement of extraocular muscle after two types of recession surgery with non-invasive tool called AS-OCT.

* Who can participate? patients who will undergo two types (conventional method and hang-back method) of typical bilateral lateral rectus recession surgery for correcting intermittent exotropia

* What does the study involve? Volunteers will attend a clinic for four visits over three months. They will undergo AS-OCT at every visits during follow up period. AS-OCT is non-invasive test to evaluate operation site. The test only requires their cooperation when they undergo AS-OCT.

* What are the possible benefits and risks of participating? This is non-invasive test for your postoperative follow up. Therefore, there will be no risks about this test.

* Where is the study run from? Samsung Medical Center

* When is the study starting and how long is it expected to run for? From April 2015 to Dec 2015

Detailed Description

This study is a following study of our prior study about AS-OCT in strabismus. The aim of this study is to compare the longitudinal changes of lateral rectus (LR) muscle insertion between two types of bilateral recession surgery. An AS-OCT scan of the LR muscle was performed every visits. Data on gender, age, degree of deviation (prism diopter), and spur-LR insertion distance using AS-OCT were collected at postoperative months 1,3 in each group.

Study Timeline

• Status Verified: 2015-04
• Study Start: 2015-05
• Study First Submitted: 2015-05-18
• Study First Submitted QC: 2015-05-20
• Last Update Submitted: 2015-05-20
• Study First Posted: 2015-05-21
• Last Update Posted: 2015-05-21
• Primary Completion: 2015-08
• Study Completion: 2015-12

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 60

Inclusion Criteria

• patients who will undergo bilateral lateral rectus recession surgery for correcting intermittent exotropia

Exclusion Criteria

• previous ocular surgery
• other ocular diseases except intermittent exotropia
• amblyopia

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
The change of limbus-muscle insertion distance measured with AS-OCT	baseline and 1.3 months