Introduction: Determination of the scope of surgical interventions, either retropositioning or myectomies of the horizontal rectus extraocular muscles is based on calculations that do not take into account the distance of the insertion of the respective muscle.
Aim: The aim of this article is to assess the variations of insertion of the horizontal rectus extraocular muscles.
Materials and Methods: The research includes 63 children (126 eyes) with an average age of 4 years and 4 months (the youngest is 1y and 2m old; and the oldest is 16y old) with comitant horizontal strabismus, all of whom underwent surgery for a period of 2 years (2016 – 2018). All patients have gone through a thorough ophthalmic examination, including determination of cycloplegic refraction. Measurement was performed intraoperatively.
Conclusion: It was determined that the median distance between the limbus and the insertion regarding the medial rectus muscle was 5.11 mm (ranging from 4.5 mm to 7 mm) and regarding the lateral rectus muscles – 6.29 mm (ranging from 5 mm to 8 mm). The main finding shows that the insertion of the horizontal rectus extraocular muscles varies significantly, which requires intraoperative refinement of the scope of surgical intervention to achieve maximum therapeutic result.
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