Your Biofinity Multifocal Fitting Guide Explained

Your Biofinity Multifocal Fitting Guide Explained

Have you noticed yourself squinting to read restaurant menus or struggling to see your phone screen recently? Welcome to presbyopia, my friend. It creeps up on all of us eventually.

By age 45, nearly half the population battles the frustrating effects of presbyopia as the eyes’ natural focusing ability diminishes. Multifocal contact lenses provide a convenient, spectacle-free option to regain clear near and distance vision. No more blender face trying to read text messages!

Biofinity Multifocal stands out as a top monthly multifocal lens choice for its excellent comfort and breathability. This silicone hydrogel lens features customizable parameters to fit a wide range of prescriptions. With innovative dual optical zone designs, Biofinity Multifocal can optimize vision at every distance.

Understanding the fitting guide recommendations allows you to expertly fit these lenses for superior vision and all-day comfort. Read on as we walk through the key steps to fitting Biofinity Multifocal lenses for success.

Highlighting the Benefits of Biofinity Multifocal

Silicone hydrogel materials like Biofinity offer several notable advantages over traditional hydrogel lenses. The highly breathable comfilcon A formulation has a water content of 48% for cushiony comfort while allowing abundant oxygen to reach your eyes. Studies show over 50% higher oxygen transmission compared to leading hydrogel multifocals.

The result? Reduced risk of complications like corneal swelling and injection that limit wearing time. Nine in ten patients can comfortably wear Biofinity Multifocal lenses for the full monthly replacement schedule without dryness or irritation.

In independent clinical studies, over 80% of wearers reported excellent distance and near visual acuity with Biofinity Multifocal lenses. The aspheric optical design provides seamless vision transitions at every gaze angle. Whether looking at your smartphone screen up close or the highway road signs ahead, this lens has you covered.

With parameters available from +6.00D to an impressive -10.00D powers, Biofinity Multifocal suits most prescriptions. Diameters range from 13.8mm to 15.0mm and base curves span 8.3mm to 9.1mm. This extensive selection allows a customized fit for optimal centration and movement.

Exciting research also shows promise for slowing childhood myopia progression by 30-60% using the Biofinity Multifocal center-distance design. Though not yet FDA approved for myopia control, initial study results provide hope for reducing dependence on glasses or contacts over time.

Decoding the Biofinity Multifocal Fitting Guide

A methodical stepwise approach ensures fitting success with these innovative lenses. Let’s break down the key guidelines:

Determine Eye Dominance

Identify which eye functions as the dominant eye, responsible for distance viewing. The quick “blur test” rolls off the tongue:

Have your patient look at an eye chart. Place a +1.50D blurring lens first over one eye, then the other. The eye that reports more blurred vision becomes the non-dominant eye delegated for near tasks.

Select Initial Distance Power

Start by determining the distance refractive correction. Convert the spectacle Rx to vertex adjusted contact lens power in both eyes using the standard 0.75mm correction factor.

For example, a prescription of OD -2.25D becomes the fitting starting point of -3.00D OD. Round to the nearest 0.25D when selecting the initial Biofinity Multifocal trial lens.

Choose Add Power

The add power balances distance clarity with sufficient near focusing ability. Match the spectacle add prescribed for reading. Choose Low, Medium, High or Extra High add Biofinity Multifocal lenses accordingly.

As the add power increases, transfer to a center-near “N” design for the non-dominant eye to maintain excellent distance vision in the dominant eye. Follow this sequence:

  • Up to +1.25D add = Low add “D” lens both eyes
  • +1.50D to +1.75D add = Low add “D” lens both eyes
  • +2.00D to +2.25D add = Low add “D” lens both eyes
  • +2.50D add = Low add “D” dominant eye, Low add “N’ non-dominant eye

Refining the Lens Prescription

Multifocal contact lens fitting aims to balance sharp distance and functional near acuity. We fine tune the powers in a methodical sequence if needed.

Improving Distance Vision

If distance clarity lacks with the initial lenses, troubleshoot as follows:

  1. Over-refract the dominant eye by adding -0.25D to -0.50D more minus power while checking acuity. This may provide the extra oomph needed for good distance sight.
  2. If over-minusing doesn’t solve the distance blur, return to the original vertexed distance Rx in both eyes. Next, reduce the add power by one level in both lenses (e.g. from Low to Medium add).

Boosting Near Vision

For persistent near vision difficulties:

  1. Over-refract the non-dominant eye first by trying +0.25D to +0.50D more plus lens power. This adjustment provides extra magnification for reading tasks.
  2. If adding plus doesn’t nip the problem, revert to the original distance powers. Now bump up the add power a level instead (e.g. Low to Medium).
  3. If visual struggle continues, return the add back to the original power. Switch the non-dominant lens to the “N” center-near design (e.g. Low add “N”). This emphasizes near vision support.

In essence, tweak the balance of correction gradually between eyes and across lens zones. Following this balanced troubleshooting sequence optimizes success fitting multifocal lenses.

Understanding Biofinity Multifocal Optics

The Biofinity Multifocal lens design stands out with excellent intermediate clarity. Wearers enjoy seamless transitions focusing between digital devices, computer screens and reading.

The “D” or dominant eye lens has a central optical zone dedicated to distance vision. Surrounding zones feature aspheric curves customized for computer distance and near tasks.

The “N’ or non-dominant eye lens flips the optics. Here the central zone focuses precisely at near. Distance and intermediate vision corrections occupy the peripheral optical zones instead.

How does it work? Light from objects at every viewing distance simultaneously enters the pupil. The brain perceives the clearest, most focused image. Surrounding unfocused images fade into the background. This automatic selection mechanism eliminates head tilting or eyes darting around to find the sweet spot when multitasking.

Real world vision rarely relies on one eye alone. Both eyes integrate images and cues. With Biofinity Multifocal, the balanced optics keep images equally sharp when viewing across the visual spectrum distance-wise.

Finding the Right Biofinity Multifocal Parameters

Choosing the optimal lens parameters fine-tunes vision and wearing comfort. Consider all the measures that impact fit.

Powers

Available powers span an impressive +6.00D to -10.00D range in 0.25D steps. This selection accommodates most presbyopic prescriptions.

For powers above -4.00D, check for sufficient clearance between the back lens surface and cornea. Steeper base curve or larger diameter options reduce contact.

Base Curve

The base curve largely determines lens stability and centration on the eye. Biofinity Multifocal offers base curves from 8.3 mm for average corneal curvatures to 9.1 mm for steep cornea fittings.

Start with an alignment approach matching the flatter corneal meridian. Adjust in 0.2 mm steps steeper or flatter as needed. Look for post-blink movement 1-2 mm with steady centration.

Diameter

Larger diameter lenses provide more stable centration and fuller corneal coverage. They also limit vision in dim lighting as the pupil dilates larger.

Balance optimal fitting characteristics with the visual demands of the patient’s lifestyle when selecting diameter. Occupational computer use favors smaller pupils while night driving alignment leans toward wider lenses.

Keys to Fitting Success

Multifocal lenses require clear communication and patience perfecting the parameters. Certain limitations apply for ideal performance as well.

Patient Candidacy

The presbyope’s refractive error and add power ranges suitability for multifocals. Low to moderate myopes and hyperopes wearing up to +2.50D adds fit quite well with excellent visual acuities.

Patients relying heavily on crisp distance sight such as commercial pilots require careful consideration. Significant residual astigmatism after correction also poses vision challenges with multifocal optics.

Small pupil sizes fundamentally limit near image projection onto the retina. Fit multifocal lenses only when photopic pupils measure at least 3.5mm diameter. Presbyopes in their mid-40s on average maintain this adequate opening size in light conditions.

Yet don’t dismiss this corrective option too quickly! Try the specialist Biofinity Multifocal XR contact lens for presbyopes over age 60 struggling with small pupils. The XR features expanded optical zones for optimized performance.

Crystal Clear Communication

Paint a realistic vision picture for the presbyope preparing to wear multifocals. Avoid rosy promises in order to set the stage for long-term success.

Multifocals trumps monovision or readers yet represents visual compromise compared to single vision crispness. Wearers require committed practice alternating focus between images. There is no instant adaptation “eureka” moment.

Be upfront about potential transient headaches, dizziness, eyestrain or blurred vision during the initial adjustment phase. Reassure the motivated patient these typically resolve within days to weeks of consistent wear.

Share helpful environmental tips too like tilting reading material, using magnification apps, or lighting adjustment. Remember, multifocals only provide part of the visual equation. The informed motivated wearer willing to implement practical habits fills in the rest.

How Do Eye Dilation Sunglasses Relate to Biofinity Multifocal Fitting?

When fitting Biofinity Multifocal contact lenses, using eye dilation sunglasses essentials can help simulate real-world conditions for patients. By mimicking the natural dilation of the eye, these sunglasses allow for an accurate assessment of vision and comfort, leading to a better overall fitting experience.

Troubleshooting Challenges

A methodical and patient approach allows most motivated wearers to achieve excellent multifocal vision over 3-4 weeks. But what if hurdles emerge for that rare patient along the way?

Residual Astigmatism

Toric multifocal lenses come to the rescue for residual cylinder affecting vision! Rotate trial toric lenses to align the axis with the steep corneal meridian. Balance supporting distance acuity while adequately correcting astigmatism.

Still struggling with crispness wearing toric multifocals? Remeasure corneal topography looking for irregular astigmatism missed on routine exam. Order custom toric lenses optimized for the entire marked corneal surface.

Handling Difficulties

Silicone hydrogels like Biofinity Multifocal offer excellent comfort. Yet the ultra thin flexible materials prove challenging for some patients to insert, remove and handle.

Consider daily disposable multifocal lenses if dexterity factors interfere with successful wear. The lens simply gets tossed at the end of each day rather than requiring cleaning and disinfection. ACUVUE® MOIST Brand Multifocal and DAILIES TOTAL1® Multifocal stand out as top performer disposables.

Vision Imbalance Between Eyes

Fitting multifocals means deliberately unbalancing vision between the eyes. The dominant eye sees clearly at distance and intermediate. The non-dominant eye assumes near viewing responsibility only.

If one eye demonstrates consistently poorer visual acuity, recheck the balance of lens parameters. Over-refract again making small incremental power adjustments. Alternate trials of the “D” versus “N” lens version influence the right versus left eye dominance too.

Off-Label Applications

Beyond straightforward presbyopia correction, Biofinity Multifocal lenses also provide myopia control and post-operative solutions.

Slowing Myopia Progression

The Biofinity center-distance multifocal design recently displayed potential slowing myopia progression by 30-60% in children!

Though not FDA approved yet for this indication, initial results hold promise as an alternative to atropine drops or orthokeratology for concerned parents. The contact lens optics reduce peripheral retinal defocus when the eyes elongate affecting refraction.

Under specialist guidance, a larger diameter Biofinity Multifocal can act similarly to reshape corneal curvature over time. This application suits school-aged children under corrected needing myopia reduction, especially when glasses or OK lenses prove unwieldy.

Post-Refractive Surgery Vision Correction

Multifocal contact lenses represent an excellent option for presbyopes struggling with near tasks after LASIK surgery. The procedure flattens the cornea improving distance vision at the expense of reading ability long-term.

Biofinity Multifocal selected based on topography readings after LASIK provide crisp visual correction at all ranges again. The lens vaults over the highly modified corneal surface unlike spectacles. Custom toric multifocal lenses fine-tuned for post-surgical topography changes also maintain balanced sight for previous astigmats.

Your Biofinity Multifocal Take-Home Messages

As the global population ages, success fitting multifocal lenses becomes paramount in your practice. Understanding and smartly applying fitting guide recommendations including customization allows superior visual outcomes.

Set the stage through education and expectation management. Methodically refine powers balancing acuity at critical distances. With patience and persistence adapting to the optics, the motivated wearer finds excellent Biofinity Multifocal vision possible in work and play alike!

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