摘要
大约二百年前,Thomas Young 发现晶体眼患者戴远用眼镜仍能阅读,故认为无晶体眼仍有调节存在。此后不少学者陆续报道了这一现象,并称之为“显性调节”。1950年,Bettman 结合病例分析并参照各家学说,对这一现象的机理做了综合性推论,而Nagazawa 又于1983年、1984年相继提出不同意见,故目前对此现象的机理尚无定论。近年来,随着人工晶体植入术的迅速发展,有必要对此现象进行深入研究,这对今后研究设计可调节性人工晶体将有所帮助。
We measured the apparent accommodative power with COWA HS-9 accommodopolyrecorderin 31 aphakia(21 cases)and 6 pseudophakia(6 cases)both before and after the pupil wasdilated 5-6mm in diameter by 1% neosynepherine,all patients were operated by one of oursenior staff one year before,the size and the shap of the pupil,the depth of the anterior cham-ber,and surface of the vitrous were also examed in detail.The apparent accommodative pow-er obtained from the aphakia was 2.45±1.06D before pupil dilated and 1.81±0.97D afterpupil dilated,difference from this two value was 0.63±0.50D In pseudophakia,it was 4.11±2.38D in small pupil,2.84±2.55D in dilated pupil,difference between the small and dilat-ed pupil was 1.27±0.98D.No significant difference were obtained from small and dilated pupil in both groups,so itcan hardly explained the apparent accommodative mechanism only with the field depth bypupil contract during accommodation and convergence.Amount of pseudophakia apparent accommodative power were much bigger than theaphakia by statistical significant.Farther research work of the mechanism of the apparent accommodation was needed forthe new design of a accommodative IOL.
