Methods The color and transparency of different concentration phantoms were observed. Properties including density, acoustic speed and acoustic attenuation of PAA gel phantom were measured.
方法观察模块浓度的不同所致颜色与透明度的变化，并对PAA模块的声学特性包括密度、声速及声衰减进行测量。
Objective To evaluate the therapeutic efficacy of the domestic polyacrylic acid (PAA) gel for the treatment of dry eyes.
目的评价国产聚丙烯酸(PAA)凝胶治疗干眼症的临床疗效。
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