•Background and study aims : The investigators conducted this study to evaluate the movement of extraocular muscle after strabismus surgery with non-invasive tool called AS-OCT. * Who can participate? patients who underwent typical lateral rectus recession surgery for correcting intermittent exotropia * What does the study involve? Volunteers will attend a clinic for four visits over six 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 Feb 2014 to Dec 2014
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The change of limbus-muscle insertion distance measured with AS-OCT
Timeframe: baseline and 1.3.6 months