To study the effect range of the Nd:YAG laser through various levels of cloudy medium for targets with varying grayscale values in vitro. The coated paper cards with grayscale values of 0, 50, 100, and 150 were used as the laser's targets, which were struck straightly with varying energies using three burst modes (single pulse, double pulse, and triple pulse). Six filters (transmittances of 40, 50, 60, 70, 80, and 90) were applied to simulate various levels of cloudy refractive medium. Image J software was used to measure the diameters and regions of the laser spots. The ranges of the Nd:YAG laser spots increased with energy in the same burst mode (P < 0.05). Under the same amount of energy, the ranges of the Nd:YAG laser spot increased with the grayscale value of the targets (P < 0.05). The greater the transmittance of the filters employed, the larger the range of the Nd: YAG laser spots produced. Assuming that the total pulse energy is identical, the effect ranges of multi-pulse burst modes were significantly larger than those of single-pulse burst mode (P < 0.05). The effect range of a Nd:YAG laser grows with increasing energy and the target's grayscale value. A cloudy refractive medium has a negative impact on the effect range of the Nd: YAG laser. The single pulse mode has the narrowest and safest efficiency range.

体外研究Nd:YAG激光通过不同级别的混浊介质对不同灰度值目标的作用范围。以灰度值为0、50、100和150的涂层纸卡作为激光目标，使用三种突发模式（单脉冲、双脉冲和三脉冲）以不同的能量直接照射这些卡。应用六个滤光片（透射率分别为 40、50、60、70、80 和 90）来模拟不同级别的混浊折射介质。使用Image J软件测量激光光斑的直径和面积。在相同的突发模式下，Nd:YAG 激光光斑的范围随着能量的增加而增加（P  < 0.05）。相同能量下，Nd:YAG激光光斑射程随靶材灰度值的增大而增大（P  < 0.05）。所采用的滤光片的透射率越大，产生的 Nd:YAG 激光光斑的范围就越大。假设总脉冲能量相同，多脉冲突发模式的影响范围显着大于单脉冲突发模式（P  < 0.05）。 Nd:YAG 激光器的作用范围随着能量和目标灰度值的增加而增加。混浊的折射介质会对 Nd:YAG 激光器的作用范围产生负面影响。单脉冲模式具有最窄和最安全的效率范围。