Endoscopic surgery of the accessory nasal sinuses (ANA) is widely used as the main treatment method for ANA diseases. It is a well-proven, safe and effective method. However, occasionally certain complications may occur. Ophthalmic complications are rare but can lead to irreversible changes. Anatomical organization of the orbit and paranasal sinuses contributes to the risk of damaging the eye ball and its appendages. During endoscopic sinus surgeries, of the ethmoid bone, extraocular muscles, the optic nerve and the lacrimal passages can be damaged. Ophthalmic complications are classified as non-significant, significant and severe. Studying the data obtained with multi-slice computed and/or magnetic resonance tomography and the patient's medical history during the preoperative stage is necessary in order to minimize the risk of such complications, as well as monitoring the clinical data during all stages of treatment.
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