With completely custom lens surfaces comes the opportunity to try and address higher order aberrations. The changing gaze angle of the eye during normal vision makes correction difficult in general use. However, researchers have claimed some improvements in vision using aspheric designs. Further, vision is a very active process, wherein eye movements are undertaken to improve understanding of the current scene. This suggests that the eye might discover and utilize a special high-order correction zone.
FormuLens provides the ability to incorporate various types of high-order corrections in freeform lenses.
The FormuLens Custom Generic PAL (Progressive Addition Lens) is a single product which can be adjusted through a wide range of performance requirements. With adjustable fitting heights from 12 to 22 mm, and “hardness” ranging between the extremes offered by designs from major vendors, and everything in between. The design is optimized computationally using our lens design system SimPAL for a dense grid of setting combinations.
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Progressive Lens design is a complex problem. As described in our PAL Anatomy article, there are a large number of lens details to optimize and trade-off. Further, it is not even clear how one can change such structural features to get the desired result.
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