PROTECTION FOR DIRECT SELECTIVE LASER TRABECULOPLASTY

摘要

An apparatus includes an optical unit (30), including a light source (66), one or more beam- directing elements (50, 56), and a radiation source (48). The radiation source is configured to irradiate an eye (25) of a patient (22) with one or more treatment beams (52) by emitting the treatment beams toward the beam-directing elements, while the eye fixates on the light source by virtue of the light source transmitting visible light (68). The apparatus further includes an optical filter (70) configured to inhibit passage of the treatment beams, but not the visible light, therethrough, while interposing between the beam-directing elements and a pupil (104) of the eye. Other embodiments are also described.