Ruby

The ruby laser was the first of such devices to be used in dermatology [6]. The ruby laser emits red light at a wavelength of 694 nm. The depth of penetration into the skin is believed to be approximately 1 mm using clinically relevant doses [12]. This laser has been used to treat congenital melanocytic lesions [13], benign pigmented lesions [14], remove tattoos [15], and also as a hair epilating device [16]. A review of clinical history of ruby laser is pre­sented by Anderson [ 17 ] .