Continuous Transitional Focus (CTF) is a new patented optical technology that has led to a unique and revolutionary concept of presbyopia-correcting IOL. With a completely new optical approach, CTF technology creates multiple elongated focal points allowing a full range of vision from near to infinity with a smooth continuous transition. The continuous transition results in higher quality of vision at all distances, with none or non-disturbing unwanted optical side effects as visual artifacts. CTF technology reaches a good balance between range, quantity and quality of vision, offering a more natural vision to presbyopic and cataract patients with subsequent higher degrees of satisfaction.
CTF technology is composed of different segments that wisely combine refractive and spherical aberration principles with a unique variable distribution. With a slight continuous transition of power and asphericity along and across each segment, CTF technology results in closely spaced multiple focal points each of them being elongated with enhanced depth of focus. Hence creating a continuous transition between these multiple focal points that result in uninterrupted quality images for the brain from distance to near.
The image above illustrates the power transition within and along each segment (note the color degradation inside each segment). The transition of power from the center to the peripheries of each individual segment result in a curved, continuous and non-linear power distribution along the radius of the IOL without hard diopter transitions. This is a major difference from standard MIOLs that have a uniform power distribution along each ring with a hard diopter transition from distance to near.