In this part of the course an overview will be given of the most common and most important conjunctiva and eyelid tumors ( basal cell carcinoma, squamous cell carcinoma, sebaceous cell carcinoma, malignant melanoma). For each disease clinical-pathologic correlations will be emphasized. Typical and atypical characteristics will be shown. In most cases the clinician finds the correct diagnosis, but even then it is important to investigate the section margins and the degree or details of the tumor. In rare cases a surprise in diagnosis is found and some important examples of these will be given, with also the useful consequences on the clinical follow-up of these patients. Correct diagnosis can also be useful in non-malignant processes and examples will be given. A short overview will be given of newer techniques and diagnostic possibilities.