In vitro Yb,Er:Glass laser hydroacoustic processing of human cataract eye lens: influence of pulse structure on removal efficiency

摘要

The paper discusses the influence of time profile of microsecond Yb,Er:Glass laser pulse on removal efficiency ofcataract lens when performing its laser hydroacoustic processing. It was established that the increase in peak power ofthe "leading" spike of Yb,Er:Glass microsecond pulse leads to increase in volume of laser-produced steam-gas cavities inliquid, increase in pressure transient amplitude arising in the phase of "collapse-rebound" of the cavity and increase inremoved volume of cataract lens as a result of its laser hydroacoustic processing (LHP). Increasing the peak power of the"leading" spike by 2.5÷3 times while keeping the total integral laser pulse energy resulted in a 5÷7-fold increase in theremoved volume of human eye lens with III degree of cataract according to L. Buratto classification. The possible multipulsemechanism of cataract lens removal when performing LHP with microsecond Yb,Er:Glass laser pulses isdiscussed.