In this paper, 30 cases of extracapsular cataract extractions with the assistance of an Nd:YAG laser are reported. Myosis phenomenon in laser operation is observed and its producing mechanism is discussed. Laser ophthalmology was the earliest field in laser application research, and pulse Nd:YAG laser ophthalmic instruments have been developed rapidly because of unique advantages in the anterior and posterior capsulotomy and trabecula shaping method.
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