A bicycle fork assembly includes a steering tube configured and arranged to be rotatably mounted to a front part of a frame of a bicycle. One embodiment has a distal pivotal portion that can be pivoted to a desired angle as a mover advances the IOL into the eye. For the J-shaped portion, an elastic binding may be disposed under a downwards folded portion. In some examples, the synchrocyclotron has a superconducting electromagnetic structure that generates a field strength of at least 6 Tesla, produces a beam of particles having an energy level of at least 150 MeV, has a volume no larger than 4.