The DIFFRACTIVA® is a multifocal capsular bag IOL, developed for cataract patients who value a natural visual impression. It offers comfortable visual acuity at all distances: near, intermediate, and far. The design with balanced
light distribution is tailored to the everyday needs of patients and offers them clear visual advantages, especially under demanding light and contrast conditions.
DIFFRACTIVA® combines several optical principles:
|FAR||Diffractive-refractive optic design for excellent visual acuity in all lighting conditions|
|INTERMEDIATE||DOLA technology for optimized light use and reduced photic effects|
|NEAR||Near addition for an ergonomic reading distance|
Diffractive-refractive optic design
The diffractive-refractive optic design achieves excellent visual acuity under both photopic and mesopic lighting conditions. The light distribution of the IOL is optimally regulated through the interaction of the illumination intensity and the pupil. Under photopic lighting conditions the light is balanced between the near and far range; in low light, the emphasis is on safety and far vision is more dominant. With a product adapted to their everyday needs, patients benefit from the best possible imaging conditions.
This is achieved by focusing the diffractive element on the central zone of the optic: This reduces glare to a minimum. The refractive edge area generates excellent distance vision under mesopic conditions and with dilated pupils, comparable to monofocal IOLs. This offers decisive safety benefits for the patient especially in low-light conditions.
DOLA technology (diffractive optic, local asphericity) generates an optimized visual acuity in the intermediate region with reduced photic phenomena. The optic design makes especially efficient use of the local asphericity of the individual stages of the diffractive element. The adapted asphericity extends the visual range with optimized light usage in the intermediate range. Glare phenomena and light loss, which often occur with polyfocal IOLs, can thus be significantly reduced.
The central diffractive element with a near addition of 3.5 D enables comfortable near vision and meets all visual requirements at a physiological working distance of about 40 cm. With increasing age and progressive neuronal cell degeneration, vision deteriorates. The IOL concept of DIFFRACTIVA® considers the increased magnification requirement and compensates for it with optimal near addition.