From 1959-1973 128 patients with tumors of the eyelids were treated at the "Augenklinik im Krankenhaus Nordstadt Hannover"; in 103 cases the diagnosis of basal cell carcinoma was histologically proved. With 62.1% of male patients prevailed the female patients with 37.9%. The age of the patients, localisation of the tumors, previous treatment and duration of involvement are discussed in detail. With the exception of 3 cases, which had a primary or secondary radiation they were surgically treated. A short explanation of the technics is given. In 82 out of 101 surgically treated cases (81%) the patients were clinically healed by a single operative treatment. During our observation there was no recurrence. Together with the number of patients, who were treated for several time, the over-all-cure-rate was 98.2%. Complications of surgical treatment are described and compared with those of other types of therapy. According to our results and as mentioned in the literature basal cell carcinomas of the peri-orbital region should be treated only by ophthalmologists. Lifelong control is necessary because of the extraordinary character of the tumor, which shows many exceptions in regard to basal cell carcinomas on other parts of the body.