Translating Multifocal

Fused PMMA Crescent Design

The Crescent Fused is a monocentric, encapsulated-segment, translating gas permeable bifocal contact lens. It uses prism ballast to maintian rotational stability and lens position. This design is manufactured with a fused PMMA segment.

This designís large reading segment makes it easier for patients to transition from distance vision to near vision in downward gaze and to maintain effective near vision for extended periods of time.  The crescent shape of the reading segment maintains near-vision despite nasal rotation below the centerline of the lens, and therefore is often favored by patients who prefer the clarity of a translating/alternating design yet suffer loss of near-vision with other translating designs due to excessive lens rotation.

The contraindications for this design are a) narrow fissure, and b) low or flaccid lower lid.  

Diameters:      8.50 mm to 10.0 mm

Base Curve:    6.50 mm to 8.44 mm

Distance:         -20.0 D to +12.00 D

Add Power:     +0.75 to +3.00 D

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Danker Laboratories

The RGP Multifocal Specialists

(800) 237-9641