|Biofinity Multifocal features highly wettable, naturally hydrophilic material to inhibit deposit formation and build-up.|
CooperVision makes fitting presbyopic patients more streamlined with Biofinity Multifocal.
By creating the Biofinity® Multifocal, CooperVision, Inc. developed a synergistic relationship between its Balanced Progressive™ Technology multifocal design and its comfilcon A 48% water, high Dk, low modulus, naturally wettable silicone hydrogel material that is FDA-approved for both daily and extended wear.
Aquaform® Comfort Science locks water within the lens matrix to minimize dehydration and maintain moisture without surface wetting agents. This material inhibits deposit formation and build-up, which enables presbyopic patients with age-related dryness to achieve all-day comfort.
Balanced Progressive Technology employs the processing power of the visual cortex to enhance all-range vision while allowing for individualized fitting for each lens wearer and for each eye. Two different optical designs achieve these goals.
A “D” lens is used for the dominant eye in which distance vision is provided by a spherical central distance zone. Surrounding the distance zone are an aspheric progressive zone for intermediate vision and an aspheric peripheral zone for near. The “N” lens is used on the non-dominant eye. A spherical near zone is in the center surrounded by an aspheric progressive zone for intermediate vision and an aspheric peripheral zone for distance.
CooperVision has simplified its fitting guidelines, suggesting practitioners start with “D” lenses in both eyes for low add patients (+1.00D and +1.50D). The diagnostic fitting sets contain center distance lenses for both eyes in +1.00D and +1.50D adds.
Mature presbyopes, who need higher adds, have three options: center distance lenses in both eyes, a choice often made by athletes and people who drive a lot; the Balanced Progressive Technology approach where the center distance lens is worn on the dominant eye, the center near on non-dominant, which works well for monovision converts and typical presbyopes; or center near in both eyes, which is ideal for patients who spend time at computer terminals.
The fitting recommendations start with a new refraction, using the fogging technique and pushing plus, and testing for ocular dominance. The vertex-corrected, spherical equivalent distance prescription should be used as the distance power of diagnostic lens, and the required add power used to choose either a center distance or center near design. Minimize add power whenever possible.
Vision is usually improved by the first follow-up visit. If lenses were fit using Balanced Progressive Technology approach, both distance and near vision should be 20/20 binocularly. Monocularly, the eye with the “D” lens should achieve 20/20 for distance, J-3 at near; the eye with the “N” lens should see at least 20/40 for distance, J-1 at near.
A little experience using various combinations of lens designs and add powers will result in fitting success for Biofinity Multifocals.
Phyllis L. Rakow is Director of Contact Lens Services for The Princeton Eye Group in Princeton, NJ.
WHERE TO FIND IT:
CooperVision, Inc. • 800-929-1431 ext. 1010 • coopervision.com