A focus system that includes a calibration subsystem and a control subsystem. The system comprises a diode laser device for producing a laser beam and to an application system based on optical wave guides that can be endoscopically introduced into a patient. These permit the user to manually remove the rack from the oven without using tools or other apparatus. The surgeon activates the surgical tool to cause the surgical blade to advance through the sclera to form an incision having dimensions to receive a scleral prosthesis.