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The Site See concentric center distance multifocal lens can be designed with single or multiple size- adjustable zones allowing the designer to optimally locate the outer ADD zones with relationship to the pupil. The lens can be designed with up to +3.75 D of ADD. The aspheric front curve guarantees smooth visual transitions between back curve zones. The lens is available with high Dk material options that include Optimum Extra, Boston XO and Acuity 100.
Approximately 130 million people in the US have presbyopia making it essential to possess treatment options. Multifocal gas permeable contact lenses provide freedom from glasses and reportedly provide far superior vision.