Dermoscopy is a technique used to see a variety of patterns and structures in lesions that are not discernible to the naked eye. This technique has several other names including epiluminescence microscopy, dermatoscopy, and magnified oil immersion diascopy. Lotion, mineral oil, alcohol or water oil may be applied to the surface of the lesion. These fluids permeate the stratum corneum, eliminate surface reflection and make the epidermis more transparent to light. Pigmented structures within the epidermis, the dermoepidermal junction and the superficial dermis can them be seen. Examination with a 10x ocular, a microscope ocular eyepiece held upside down or a dermatoscope reveals several features that are not visible with the naked eye. These features are helpful in differentiating between benign and malignant pigmented lesions. Dermoscopy provides additional criteria for the diagnosis of melanoma.