调节机制研究进展  

Research advances in accommodation mechanism

作　　者：余梓逵[1] 周绍荣[1] 

机构地区：[1]上海第二医科大学附属仁济医院眼科,200001

出　　处：《眼科研究》2004年第5期554-556,共3页Chinese Ophthalmic Research

摘　　要：有关调节的机制 ,早在 19世纪Helmholtz就已提出了“松弛理论” ,即调节时晶状体悬韧带处于松弛状态 ,晶状体依赖自身的弹性使前后极变凸 ;但该理论和实际观察到的许多调节时的晶状体改变不相符 ,故Tscherning在 2 0世纪初又提出了“紧张理论” ,认为调节时晶状体悬韧带至少一部分是处于紧张状态 ;2 0世纪 90年代 ,Schachar从数学物理模型、组织解剖及临床等多方面论证了紧张理论 ,并将其作为治疗老视的一种依据。In terms of mechanism of accommodation,von Helmholtz proposed the“Theory of relaxation” in the 19th century,assuming that the relaxation of zonular tension during accommodation would result in the anteroposterior polar steepening of the crystalline lens by its own elasticity.However,this theory is not consistent with many lentical changes occurred during accommodation.Tscherning raised the “Theory of tension” in the earlier 20^(th) century,mentioning that the zonules,at least part of them,are tense during accommodation.In the 1990s,Schachar demonstrated the theory of tension mathematically,physically,histoanatomically and clinically and developed a surgical modality to correct presbyopia.Some theories relevant to accommodation mechanism are reviewed.

关 键 词：调节机制 研究进展 松弛理论 紧张理论 

分 类 号：R778[医药卫生—眼科]