|VISTAKON’s ACUVUE OASYS for PRESBYOPIA reduces chair time per patient by eliminating guesswork for the first fit or follow-up adjustment.|
Cl manufacturers are addressing presbyopic concerns by making advancements in multifocals to enhance visual acuity, fitting options, and comfort.
Early multifocal contact lenses attempted to meet the needs of presbyopes with little success, which resulted in a large amount of contact lens dropouts. Despite patients’ disappointment with their past experience, however, there is still a strong interest in presbyopic contact lens options.
VISTAKON, Division of Johnson & Johnson Vision Care, Inc., sites a 2008 Gallup study that showed more than six in 10 adults aged 35 to 49 who wear contact lenses and eight in 10 of those older than 50 say they are interested in bifocal or multifocal contact lenses. As a result, many of today’s contact lens manufactures are taking both the eyecare professional (ECP) and patient needs into consideration to improve their multifocal offerings.
Manufacturers are starting the advancement process by addressing the most common multifocal complaints.
Compromised Vision. Blurry vision is the number-one complaint. “Multifocal contact lenses often require presbyopic patients to compromise their vision for the convenience of contact lenses,” said Christina Kirby, product manager at SynergEyes, Inc. “Most simultaneous vision multifocal contact lenses rely on aspheric surfaces to diffuse the lens optics across the visual spectrum. This results in the well-known ‘soft focus’ phenomenon, in which patients often report they can see, but everything is slightly fuzzy or shadowy.”
|MANUFACTURER ADVICE CooperVision, Inc. noticed that some eyecare professionals (ECPs) shy away from fitting multifocals because of the “perceived” issue that they are difficult to fit. Though the company cautions that multifocals are not for everybody, ECPs can become successful with the better designs that are on the market today. The key, according to CooperVision, is for ECPs to understand the lens geometry of each multifocal lens on the market. When they do this and follow the manufacturers’ fitting guides, ECPs will increase their success rate. They also need to take the time to speak with their patients about setting reasonable multifocal expectations.|
Difficulty Fitting. The amount of chair time linked to fitting multifocals is a concern for both ECPs and their patients. According to a study conducted by VISTAKON, a very small percentage (24%) of multifocal fits are successfully accomplished in just two visits, compared with 87% of spherical lens fits and 77% of toric fits. The average number of visits required for an effective multifocal fit is 3.4, and even then, nearly half the fits are reported unsuccessful.
Uncomfortable Wear. Comfort is key for any contact lens wearer, but it’s even more crucial for presbyopes who notice increased problems with dryness and discomfort when wearing their lenses as they get older.
THE LATEST SOLUTIONS
The following is an update on what contact lens manufacturers are doing to decrease the problems mentioned above.
VISTAKON. ACUVUE® OASYS™ for PRESBYOPIA reduces chair time per patient by eliminating guesswork for the first fit or a follow-up adjustment if required. A clinically validated fit procedure helps doctors select the logical first lens pair and quickly determine if it is the optimal choice for the patient.
The lens also incorporates Stereo Precision Technology™, which represents the positive design aspects of ring and aspheric lens designs while minimizing the negative aspects such as ghost images and pupil dependence. A zonal aspheric front surface and an aspheric back surface work in combination and leverage the eyes’ natural depth of clear focus, offering less dependence on illumination than older generation multifocals. Recently expanded parameters of the ACUVUE OASYS for PRESBYOPIA in-clude distance powers from +6.00D to -9.00D, in three add powers (low, mid, and high), 8.4mm base curve, and diameter of 14.3mm.
SynergEyes. Featuring a hybrid design, the SynergEyes® Multifocal lens combines the crisp vision of a rigid lens with the comfort of a soft lens. The high-definition vision incorporates two areas of focus customized for each patient: one for distance and one for near. Near and distance optics are placed exactly where the patient needs them and are kept there—even during blink or gaze shift. Featuring a concentric, center-near design, the rigid lens center masks corneal astigmatism without orientational instability to make SynergEyes Multifocal ideal for presbyopes with astigmatism. In addition, Hydrol-Eyes™ surface science provides consistent in-vivo wetting.
According to SynergEyes, a second-generation multifocal lens is expected to be launched in late 2010. The company says this new lens will offer even more improved oxygen permeability, greater patient comfort, and enhanced optics.
|Bausch + Lomb’s PureVision and SofLens Multi-Focals feature All-Distance Optics to seamlessly adjust vision and improve depth perception.|
Bausch + Lomb. The company currently offers two types of multifocal contact lenses: PureVision® and SofLens®. Both are created with All-Distance Optics™ to seamlessly adjust vision and improve depth perception. Both PureVision and SofLens Multi-Focal lenses work by gradually shifting power across the lens, creating a natural transition in focus.
PureVision Multi-Focals are Bausch + Lomb’s newest multifocal con-tact lens featuring a wide-intermediate power profile that delivers outstanding vision in the 16 in. to 48 in. range. The lenses’ thin shape and round edges incorporate AerGel, which allows natural levels of oxygen to reach the eye while simultaneously resisting debris and protein buildup.
SofLens Multi-Focal is constructed using a deposit-resistant material. This aspheric lens is progressive, with its near power toward the center and the distance vision as it progresses outward.
|The advanced technology found in Unilens’ monthly CVUE Advanced Toric Multifocal lets ECPs specify the add power and zone size.|
Unilens. The technology found in Unilens Vision Inc.’s new monthly CVUE® Advanced™ Toric Multifocal is so advanced, it lets ECPs specify the add power and zone size—in other words, it’s completely customizable. It is available in five base curves and any axis in 1° steps.
Unilens also offers the C-VUE Disposable Multifocal, an aspheric soft contact lens that has high and low power ranges along with two base curves (8.5 and 8.8), and adds up to +2.50D, +6.00D to -10.00D. Free trials and Bank Programs are available.
CIBA VISION. The Precision Transition Design found in CIBA VISION’s AIR OPTIX® AQUA MULTIFOCAL provides patients with a more realistic, smooth transition of vision from distance to close-up tasks. This lens features the AQUA Moisture System, a unique plasma surface treatment that allows high oxygen permeability.
|The Precision Transition Design of CIBA VISION’s AIR OPTIX AQUA MULTIFOCAL provides a realistic, smooth transition of vision from distance to close up tasks.|
CooperVision. And with an already wide range of multifocal offerings including Proclear® Multifocal, Proclear EP, Proclear Multifocal Toric, and Proclear Multifocal XR, CooperVision, Inc. will be introducing its Biofinity® Multifocal silicone hydrogels later this year.
As seen with these new and soon-to-be introduced multifocals, manufacturers are continuously working to develop innovative solutions to meet the diverse needs of presbyopes and the ECPs who care for them.
Marian Zboraj is Editor of Vision Care Product News.
WHERE TO FIND IT
Bausch + Lomb
800-828-9030 • bausch.com
800-241-5999 • cibavision.com
800-341-2020 • coopervision.com
877-SEE-2012 • synergeyes.com
Unilens Vision Inc.
800-446-2020 • unilens.com
Division of Johnson & Johnson Vision Care, Inc.
800-843-2020 • jnjvisioncare.com