The focal length deceleration curve addresses natural accommodation requirements for focal lens reductions from 6 meters 18 feet to 25 cm drives you’re viewing to a deceleration ramp.
NAL E-Commerce lens does not have a short and awkward navigational intermediate corridor inherent PAL Progressive lenses.
NAL E-commerce lens has funnel shaped visual field comprised of substantially aspheric lateral power bands that are aligned along a vertical design back bone.
The design back bone has a mathematically created curvature based on actual downward gaze focal
length deceleration requirement, based our unique eye/ lens interaction ergonomic model, and extensive PAL Fitting data.
The focal length deceleration curve addresses natural accommodation requirements from 6 meters (20′) to 35 cm (1′ 4″) along a continuous, smooth focal length deceleration ramp.