Method and apparatus for removing cataractous lens tissue by laser radiation
Номер патента: CA1245297A
Опубликовано: 22-11-1988
Автор(ы): Francis A. L'Esperance
Принадлежит: Individual
Опубликовано: 22-11-1988
Автор(ы): Francis A. L'Esperance
Принадлежит: Individual
Реферат: METHOD AND APPARATUS FOR REMOVING CATARACTOUS LENS TISSUE BY LASER RADIATION ABSTRACT OF THE DISCLOSURE The invention contemplates apparatus and technique for surgically non-invasive surgery to remove cataracted-lens tissue, enabling the beam output of a laser to be focused from a convergent-ray bundle to a focal spot of maximum power density at the anterior surface of a cataracted lens and which scans the focal spot over a predetermined area or areas of the cataracted lens. The beam is a focal and therefore diffuse as it enters the eye through the cornea, and it is also diffuse (being divergent) in the controllably unlikely event that the laser energy passes through an opening it has created in the cataracted lens; the diffusion assures against damage to either or both of the cornea and the retina, for power levels sufficient to achieve ablative photodecomposition and/or thermal decomposi-tion and/or photofragmentation and/or photoemulsifica-tion of the cataracted-lens tissue. Various features are disclosed for assuring safety and uniformity in the removal of involved tissue.
Method and apparatus for ablating and removing cataract lenses
Номер патента: WO1988004540A1. Автор: Patricia E. Bath. Владелец: Bath Patricia E. Дата публикации: 1988-06-30.