Translating Multifocal
Inverse
Crescented Design
The Inverted Crescent is a translating/alternating multifocal
design with a
superior
distance power zone and a large,
inferior, crescent-shaped reading segment located on the front surface of the
lens. 
The optics of the near-vision zone are lathed on the front
surface of the lens, allowing the Inverted Crescent to
accommodate
spherical, aspheric or toric base curve geometry.
This design’s large superior-zone reading segment makes it easier for patients to perform critical near vision tasks above eye level. The crescent shape of the distance segment maintains distance-vision despite nasal rotation below the centerline of the lens, and therefore is often favored by patients who experience excessive lens rotation. The crescent-shaped distance segment also enhances peripheral distance vision.
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
Danker Laboratories
The RGP Multifocal Specialists
(800) 237-9641