不同病程对先天性白内障术前和术后视力影响的研究

目的了解不同病程变化对先天性白内障患者视功能的影响。方法对五种先天性白内障８７６例的病史进行回顾性研究。结果（１）病程越长，术前视力受损越重，病程＜１年时，以全性白内障视力下降最明显；病程在１～４年时，以致密核性白内障视力下降最明显；病程＞４年时，除前极性白内障外的四种白内障视力均明显下降。（２）术后视力恢复依赖于术前视力水平，以病程＜１年时这一关系最为明显。（３）某些先天性白内障视力变化有加速趋势，尤以先天性致密核性白内障最为明显。结论及早发现，及时治疗是确保良好视功能的关键。

Study on the effect of different disease courses on pre and post operative visual acuity in cases with congenital sataract

Objective To study the effect of different disease courses on the visual acuity of congenital cataracts.Method 876 cases with five kinds of human congenital cataract have been studied.Results It has been found that the preoperative visual acuity (VA) is closely related to the length of disease cours. The longer the course of disease, the worse the VA. When the disease courses were shorter than one year,the most serious reduction of preoperative VA was found in the patients with congenital total cataract. When the disease courses were within one to four yeard, the most remarkable reducton of VA was found in patients with congenital dense nuclear cataract (CDNC). When the disease courses were longer than four years, except the congenital anterior polar cataract, the VA in all the other four kinds of cataracts were decreased significantly. It is indicated that the postoperative VA highly depends on the preoperative VA.In the group with disease courses shorter than one year, this relationship is the most remarkable.Some kinds of congenital cataract showed accelerated changes in preoperative VA, especially in the CDNC. Conclusion It is suggested that the key point to get better visual function in cases with congenital cataract should be to discover and treat the patients as early as possible.