The relevance of this study lies in the development and implementation of an effective method of the Tenzel flap for the reconstruction of full-layer defects of the lower eyelid after resection of basal cell carcinoma. The purpose of this scientific study was to reconstruct the lower eyelid after resection of basal cell carcinoma using the Tenzel flap method and to investigate its effectiveness and results. The main feature of the surgical procedure was the use of a semicircular rotary Tenzel flap to repair moderate eyelid defects. This method involved the formation of a flap that starts from the outer corner of the eye, then moves up and along the temple, without crossing the outer edge of the eyebrow. After that, lateral cantolysis was used. The uniqueness lies in the ability to effectively correct moderate eyelid defects in one step, which simplifies the surgical process and minimises trauma to the patient. A significant condition in this procedure is the preservation of the tarsal plate on both sides of the excision, which allows preserving the structural integrity of the eyelid. Furthermore, this modification involves the use of the chondrocytic part of the nasal septum as a substitute and shows the effectiveness of this approach in the reconstruction of the eyelid after removal of basal cell carcinoma. Thus, the specific feature of the described surgical intervention is its effectiveness for moderate eyelid defects and the possibility of using modified methods of substitutes for complex defects. Given the results of the study, this modified method may become a major step in the treatment of patients with basal cell carcinoma, contributing to satisfactory cosmetic and functional results