摘要目的 观察长期视远剥夺对眼集合近点、调节近点的影响.方法 8名受试者按年龄分为A组(≥30岁)和B组(<30岁),同时在不可外视的实验室中连续工作生活75 d,每隔15 d测量眼集合近点和调节近点,观察其变化.结果 随着实验时间的延长,2组受试者的集合近点均有增加的趋势,其中A组受试者第75天时的集合近点与第15天时相比,差异有统计学意义(P<0.05);B组受试者第30天的集合近点与第15天时相比.差异有统计学意义(P<0.05),第45天以后的集合近点与第15天时相比,差异更显著(P<0.01).随着实验时间的延长,调节近点有增加的趋势,但各时间点差异均无统计学意义(P>0.05).结论 长期视远剥夺可引起眼集合近点不同程度变远,对调节近点影响不明显.

abstractsObjective To study effects of sustained deprivation of far sight on human near point of convergence (NPC) and near point of accommodation (NPA). Methods Eight subjects were divided into two groups by age (group A ≥30 years old; group B<30 years old). All subjects had worked in the enclosed laboratory, unable to see the outside for 75 days. NPC and NPA were measured every 15 days. Results NPC values of both groups all increased when time elapsed. NPC of group A measured in the 75th day and NPC of group B in the 30th day all had statistical differences, when compared with the base NPC values measured in the 15th day (P<0.05). And NPC value of group B measured in the 45th, 60th and 75th days increased markedly, when compared with that of the 15th day (P<0.01 . However, statistical analysis showed that no significant difference could be seen in NPA values of the two groups (P>0.05). Conclusions Sustained deprivation of far sight could induce an increase in NPC values to various degreeal, but effects on NPA were not obvious, as noted in our experiment.