the group consisting of means for magnetic coupling means for mechanical coupling means for electromechanical coupling and means for electromagnetic coupling the preferred embodiment of tip apparatus 100 comprises magnetic material in the housing 54 which when the tip apparatus 100 is positioned on the surgical device 500 is proximate to a magnet within the surgical device 500 releasably locking the tip apparatus 100 to the surgical device 500 the tip apparatus 100 first end 10 and second end 20 are made of at least one member of the group consisting of polyimide polycarbon stainless steel and steel iron plastic aluminum and the like materials in a preferred embodiment of disposable tip assembly 10 for reusable surgical laser treatment device 500 the tip assembly 10 is packaged as a sterile assembly and comprises in combination a first sleeved end 16 adapted to releasably fit on the device 500 and having a longitudinal axis 12 a second cannula end 20 tapering to a discharge tip 22 optical fiber means 30 for delivery of light energy axially positioned within the tip assembly 10 and extending beyond the discharge tip 22 means for removably locking the first sleeved end 16 to the device 500 and connecting the first sleeved end 16 second cannula end 20 and optical fiber means 30 and means for aligning fiber optic means 30 within the tip assembly 10 with.