Patent ID: 8715273
Filing Date: 2014-05-06
Classification: A61B,A61F

Abstract:
1. A method for preventing a secondary cataract after a cataract operation, comprising: A) supplying a fluid medium to epithelial cells; B) generating pressure pulses in a fluid medium to impact the epithelial cells within a lens-capsule bag of an eye; and C) preventing at least one of proliferating or migrating of epithelial cells at an inside of the lens-capsule bag by at least one of detaching epithelial cells from a wall of the lens-capsule bag and inhibiting epithelial cells remaining on the wall of the lens-capsule bag by impacting pressure pulses; D) wherein the pressure pulses produce no hole in the wall on lens-capsule bag during detaching or inhibiting of the epithelial cells; E) wherein a pulse repetition rate of the pressure pulses is at most 4 pulses per second to allow a tissue of the lens-capsule bag, after a pressure pulse, to relax and enter a low-tension state by a time a next pressure-pulse occurs; and F) wherein the pressure pulses are generated by irradiating a target with laser radiation and causing a shock wave by optical breakdown generated by absorption at a target material, and the laser radiation is pulsed, with a pulse duration between 5 and 20 ns and with a pulse energy between 1 and 20 mJ, such that each laser pulse generates at least one pressure pulse.