首页>
外国专利>
VARYING A NUMERICAL APERTURE OF A LASER DURING LENS FRAGMENTATION IN CATARACT SURGERY
VARYING A NUMERICAL APERTURE OF A LASER DURING LENS FRAGMENTATION IN CATARACT SURGERY
展开▼
机译:白内障手术中晶状体碎片化过程中激光数值孔径的变化
展开▼
页面导航
摘要
著录项
相似文献
摘要
Some embodiments disclosed here provide for a method fragmenting a cataractous lens of a patient's eye using an ultra-short pulsed laser. The method can include determining, within a lens of a patient's eye, a high NA zone where a cone angle of a laser beam with a high numerical aperture is not shadowed by the iris, and a low NA zone radially closer to the iris where the cone angle of the laser beam with a low numerical aperture is not shadowed by the iris. Laser lens fragmentation is accomplished by delivering the laser beam with the high numerical aperture to the high NA zone, and the laser beam with the low numerical aperture to the low NA zone. This can result in a more effective fragmentation of a nucleus of the lens without exposing the retina to radiation above safety standards.
展开▼