Safety mechanism for a laser treatment unit

摘要

Unit comprises a contact glass (23), which can be placed onto the eye (22) and via which a treatment laser beam (2) passes. A safety mechanism (24, 25) is provided that displaceably holds the contact glass in such a manner that the it retreats when the contact glass is subjected to the action of a force contrary to the direction of incidence of the laser beam. The safety mechanism enables this retreating when a force is greater than a force threshold (Fmin) and holds the contact glass fixed if the force is less than the threshold value. The invention also relates to a laser treatment unit for eye surgery.