Sivak J G, Kreuzer R O, Hildebrand T
Ophthalmic Res. 1985;17(1):54-9. doi: 10.1159/000265350.
Concern has been expressed in the literature regarding the frequency and amount of astigmatism found in patients with intraocular lens implants. Postoperative tilting of the implants is one suggested cause. We have measured the effect of tilt on focal length in lenses supplied by two companies. The method used involved photographing the refractive effect of lenses on fine parallel laser beams as the lenses were tilted to varying degrees. The results show that: (a) drastic tilting (e.g. 20 degrees) is required to produce significant amounts of variation in focal length, (b) the effect on back vertex power is more important, (c) spherical aberration of the lenses is minimized.
文献中已对人工晶状体植入患者中发现的散光频率和程度表示关注。植入物的术后倾斜是一个推测的原因。我们测量了两家公司提供的晶状体倾斜对焦距的影响。所使用的方法包括在晶状体倾斜到不同程度时，拍摄晶状体对细平行激光束的折射效果。结果表明：(a) 需要大幅倾斜（例如20度）才能产生显著的焦距变化量，(b) 对后顶点屈光力的影响更为重要，(c) 晶状体的球差最小化。
