Frequency
55 Multifocal are Disposable contact lenses manufactured by CooperVision. Frequency
55 Multifocal features Balanced Progressive Technology that combines spherical
center zones and aspheric peripheral zones. These two zones work together to
provide exceptional distance, intermediate and near vision. Frequency 55
Multifocal contact lenses let you enjoy optimum vision quality at every
distance and the freedom of soft contact lenses.
Lens Material
The lens material is 55% water and 45% methafilcon A,
random copolymer of hydroxyethylmethacrylate and methacrylic acid. The lenses
are made by modifying the uncolred methafilcon A lens by affixing a colored
pigment on the portion of the front surface that corresponds to the iris. The
colored pigments consists of carbazole violet, chromium oxide green,
dihydrodnaphto brown, dihydroxio yellow, phthalocyanine green, iron oxide red,
iron oxide brown, iron oxide black, phthalocyanine blue, and titanium oxide.
Lens Parameters
Chord Diameter:
14.4 mm
Center Thickness:
0.16 mm
Base Curves:
8.7 mm
Powers:
+6.00D to -8.00D sphere (in 0.50 steps >-6.50)
Addition:
+1.00, +1.50, +2.00, +2.50 progressive D & N lenses
Lens Properties
Oxygen Permeability (Dk):
18.8
Water Content:
55% by weight in normal saline
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Frequency 55 MultifocalFrequency 55 Multifocal are disposable contact
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