A laser lancet tip and method for controlling laser incisions for the purpose of taking blood samples from patients in a variety of body locations and age groups. A removable tip on a laser is used to mask a laser pulse and modify the length and width of an incision made by the laser by only allowing a portion of the laser beam to contact the target surface. The depth of the incision may be controlled by either a lens or filter which is optically aligned with the laser beam.