2008 Volume 29 Issue 4 Pages 126-131
Acrylic aspherical intraocular lenses (IOLs) heve become popular and are widely used, since small incision surgery can be done, using thinner acrylic lenses with high refractive index. However, the Abbe number of acrylic is smaller, which means that acrylic lenses have larger chromatic aberration. The advantage in making the spherical aberration 0μm is to obtain the highest contrast at the focus position. However, the highest contrast cannot be expected in other than the focus position. On the other hand, optics with spherical aberration have a wide resolution range. It is said that image quality becomes bad when astigmatism remains after surgery. Here, using images made by several simulations, we show the characteristics of aspherical IOLs.
