一种基于飞秒激光白内障手术的碎核轨迹设计

摘要

针对在飞秒激光辅助晶状体碎核中,需要根据白内障患者的晶状体浑浊等级选择不同的扫描方案,且其每一层的扫描轨迹不连续的问题,提出了一种参数化的螺旋形激光扫描碎核轨迹.对螺旋形扫描轨迹进行了整体参数化定义,解出了扫描轨迹的数学模型,并求解了轨迹中关键数据点的坐标值.最后对扫描轨迹数学模型建立了仿真,其仿真结果验证了所求解扫描轨迹数学模型的正确性.此种碎核方案的每一层轨迹连续,可通过改变相应参数实现不同的切割效果,为飞秒激光辅助白内障手术提供了一种新型的碎核方案,具有一定的实用价值.%For the traditional femtosecond laser-assisted lens fragmentation surgery,it was necessary to select different scanning solutions according to the lens opacity of the cataract patients,and the scanning path of each layer was discontinuous.In view of this problem,a parametric helical laser scanning lens fragmentation path was proposed.Firstly,the parameterized definition of the helical scanning path was given.Then,the mathematical model of the scanning path was solved and the coordinate values of the key data points in the path were solved.Finally,the simulation model of the scanning path was established,and the correctness of the mathematical model of the scanning path was verified.Simulation results show that each layer path of this lens fragmentation solution is continuous,and different cutting effects can be achieved by changing the corresponding parameters.It provides a new type of lens fragmentation solution for femtosecond laser-assisted cataract surgery,and has a certain practical value.