**4.1 Eyebrow transorbital approach**

The skin incision was made along the eyebrow in accordance with the described guidelines for ESA. The planning of transorbital approach is identical to ESA and requires a thorough assessment of the topography of the frontal sinuses [14, 15]. With a high risk of penetration of the frontal sinus, the choice of lateralization of the bone window or the choice of a traditional approach will be correct.

Indications for ETA:

