Translating Multifocal

Concentric, Peripheral Add Design

The Front Surface is a concentric, simultaneous-vision multifocal design that uses a central distance zone and a peripheral near-vision zone.  The optics of the near-vision zone are lathed on the front surface of the lens, allowing the base curve to accommodate spherical, aspheric or toric geometry.  

The design is fit like a single-vision lens in that base curve selection is conducted to match an even fluorescein pattern. The design is usually fit on K or slightly steeper, depending on the corneal toricity. The Front Surface requires excellent centering to produce the simultaneous-vision effect.  

This design is preferred for patients with low-add prescriptions, ranging from +0.25 to +3.00 D, and with cylinder no greater than +2.50 D.  

Diameters:      8.50 mm to 10.0 mm

Base Curve:    6.50 mm to 8.44 mm

Distance:         -20.0 D to +6.00 D

Add Power:     +0.75 to +3.00 D

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Danker Laboratories

The RGP Multifocal Specialists

(800) 237-9641