Step 5 Underminig of Skin Muscle Flap

A skin-muscle flap is developed superiorly, laterally, and if necessary, medially, using scissor dissection in a plane deep to the orbicularis oculi muscle (Fig. 5-3). The dissection is carried over the orbital rim, exposing the periosteum.

Figure 5 3 Sagittal section through orbit and globe showing dissection between orbicularis oculi muscle and the levator aponeurosis below and orbital septum above.

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