Biofinity Toric Multifocal Fitting Guide: An Overview
Biofinity Toric Multifocal lenses address both presbyopia and astigmatism, offering a high-quality vision solution. This guide details the fitting process,
parameters, and troubleshooting for optimal patient outcomes.
Biofinity Toric Multifocal lenses represent a significant advancement in vision correction, specifically designed for individuals experiencing both presbyopia and astigmatism. These lenses combine the benefits of toric correction for astigmatism with multifocal technology to address age-related loss of near vision.
Manufactured by CooperVision, Biofinity Toric Multifocal lenses utilize Comfilcon A silicone hydrogel material, ensuring high oxygen permeability for comfortable, healthy wear. The aspheric multifocal design provides a smooth transition between distances, minimizing visual disturbances. They are available in a wide range of parameters to facilitate a customized fit, addressing diverse prescription needs. This fitting guide will help practitioners successfully fit these lenses, optimizing patient satisfaction and visual acuity.
Understanding Presbyopia and Astigmatism
Presbyopia, the age-related loss of near focusing ability, typically begins around age 40, making tasks like reading increasingly difficult. Simultaneously, many individuals experience astigmatism, an imperfection in the cornea’s curvature causing blurred vision at all distances.
Biofinity Toric Multifocal lenses uniquely address both conditions. Toric designs correct astigmatism by compensating for the irregular corneal shape, while the multifocal component provides clear vision at varying distances – near, intermediate, and far. Understanding the interplay between these refractive errors is crucial for successful lens fitting. Accurate diagnosis and a comprehensive understanding of the patient’s visual needs are paramount for optimal outcomes with these lenses.
Lens Parameters and Specifications
Biofinity Toric Multifocal lenses offer a wide range of parameters, including sphere, cylinder, axis, and add power options, for customized vision correction.
Available Sphere Powers
Biofinity Toric Multifocal lenses provide a comprehensive range of sphere powers to accommodate a diverse patient population. Initially, the lenses were available in standard sphere powers, but CooperVision has expanded the range to include additional options for greater fitting flexibility.
Currently, these lenses are available in sphere powers ranging from +3.00D to -10.00D, with increments of 0.25D. More recently, the availability was extended to include -8.50D, -9.00D, -9.50D, and -10.00D, further broadening the scope of correction. This expanded range ensures a more precise fit for individuals with higher prescriptions, enhancing visual acuity and comfort. Practitioners should always consult the most up-to-date parameter list from CooperVision for the latest availability.
Cylinder Correction Range
Biofinity Toric Multifocal lenses are designed to effectively correct astigmatism alongside presbyopia. The cylinder correction range for these lenses is quite extensive, allowing for precise correction of varying degrees of astigmatism. The available cylinder powers span from -0.75D to -5.75D, offered in convenient 0.50D increments.
This broad range ensures that a significant number of astigmatic patients can be successfully fitted with Biofinity Toric Multifocal lenses. The 0.50D steps allow for fine-tuning of the correction, optimizing visual acuity and minimizing distortion. Practitioners should carefully assess the patient’s cylinder power during refraction to select the appropriate lens parameter.
Axis Options
Precise axis alignment is crucial for successful toric lens fitting, and Biofinity Toric Multifocal lenses offer a comprehensive range of axis options to accommodate individual corneal curvatures. These lenses are available in axis markings ranging from 5 degrees to 180 degrees, incrementing in 5-degree steps.
This granular control allows practitioners to accurately match the lens axis to the patient’s astigmatic axis, minimizing rotational movement and maximizing visual clarity. Careful attention to axis selection during the fitting process is essential for ensuring stable and comfortable lens wear. Accurate keratometry readings are vital for determining the correct axis.
Add Power Options
Biofinity Toric Multifocal lenses provide a versatile range of add powers to correct near vision in presbyopic patients; These lenses are available with add powers spanning from +1.00D to +2.50D, incrementing in 0.50D steps. This allows for precise customization to meet individual patient needs and visual demands.
Selecting the appropriate add power is critical for achieving comfortable and clear near vision. Practitioners should carefully consider the patient’s lifestyle, reading habits, and desired near visual acuity when determining the optimal add power. A thorough refraction and patient interview are essential for successful add power selection.
Fitting Process: Initial Assessment
Initial assessment involves a detailed patient history, lifestyle evaluation, and comprehensive refraction to understand visual needs and determine candidacy for Biofinity Toric Multifocal lenses.
Patient History and Lifestyle
A thorough patient history is crucial. Inquire about the duration of presbyopia, previous contact lens wear (successes and failures), and any ocular surface disease.
Understanding the patient’s lifestyle is equally important. Determine their visual demands at various distances – near work (reading, computer use), intermediate tasks, and distance vision (driving, watching TV).
Specifically, ask about typical working distances and lighting conditions.
Assess their daily activities and hobbies to gauge their visual needs.
This information will guide lens selection and ensure the Biofinity Toric Multifocal lenses meet their individual requirements for comfortable and clear vision.
Refraction and Visual Needs Analysis
Perform a comprehensive refraction, including spherical equivalent, cylinder, and axis determination. Monocular and binocular refractions are essential.
Accurately measure near addition power, considering the patient’s reported reading distance. Utilize dynamic retinoscopy or subjective refraction techniques to refine the add power.
Evaluate accommodative amplitude and facility to understand the patient’s ability to focus at near.
Assess binocular vision skills, including phoria and fusional ranges.
Correlate refraction findings with the patient’s lifestyle and visual demands to establish realistic expectations for the Biofinity Toric Multifocal lens fitting.
Diagnostic Fitting
Biofinity Toric fit sets are crucial for confirming lens parameters and ensuring optimal vision correction. Trial lenses are selected based on the patient’s refraction.
Using Biofinity Toric Fit Sets
Biofinity Toric fit sets are essential tools for a successful fitting. These sets contain a comprehensive range of diagnostic lenses, allowing practitioners to accurately determine the optimal cylinder power, axis, and toric multifocal add power for each patient.
Utilizing these sets streamlines the process, minimizing chair time and maximizing fitting accuracy. The sets include lenses with varying cylinder corrections from -0.75D to -5.75D in 0.50D steps, and axes ranging from 5 to 180 degrees in 5-degree increments.
Carefully documenting the patient’s response to each trial lens is vital. Assess visual acuity, refraction, and subjective responses to identify the best-corrected vision. Remember to use this Biofinity toric multifocal fitting guide exclusively for this lens.
Trial Lens Selection Based on Refraction
Begin trial lens selection by considering the patient’s refraction, specifically the sphere, cylinder, and axis. Start with the spherical equivalent and the previously determined cylinder and axis values. Biofinity Toric Multifocal lenses offer sphere powers expanding to -10.00, with add powers from +1.00D to +2.50D in 0.50D steps.
For initial fittings, select a trial lens closest to the patient’s refraction. If the refraction falls between parameters, prioritize the cylinder and axis. Over-minus or over-plus strategies can be employed based on clinical judgment.
Always confirm the toric trial contact lens parameters using the Biofinity toric fit set. Binocular assessment with room lights on is crucial to evaluate visual performance and comfort.
Refinement and Evaluation
Refinement involves binocular vision assessment and thorough near vision evaluation to optimize clarity and comfort with Biofinity Toric Multifocal lenses.
Binocular Vision Assessment
Binocular vision assessment is crucial after trial lens application. Evaluate visual acuity at distance and near, with room lights on, to confirm optimal performance. Assess alignment and motility, checking for any induced phorias or tropias.
Pay close attention to fusion ranges and stereopsis, as these indicate the patient’s ability to combine images from both eyes. Monocular occlusion can help identify any dominance or suppression issues. Thoroughly evaluate the patient’s subjective responses regarding clarity, comfort, and any visual disturbances. This comprehensive assessment ensures the Biofinity Toric Multifocal lenses are working harmoniously with the patient’s binocular system.
Near Vision Evaluation
Near vision evaluation is a critical step in Biofinity Toric Multifocal fitting. Assess reading addition accuracy at typical working distances – usually 40cm. Utilize a standard near vision chart and ask the patient to report the clearest add power.
Observe reading speed and comprehension, noting any complaints of blurriness, strain, or difficulty with intermediate distances. Evaluate both monocular and binocular near acuity. Confirm the patient can comfortably sustain near focus for extended periods. Adjust add power as needed to optimize near vision performance while maintaining acceptable distance vision.
Troubleshooting Common Fitting Challenges
Addressing rotation issues and managing glare or haloes are key to successful Biofinity Toric Multifocal fittings, ensuring patient comfort and optimal vision correction.
Addressing Rotation Issues
Rotation of toric lenses can significantly impact visual acuity. When encountering rotation, first confirm the lens is properly oriented on the eye, checking the cylinder axis alignment. Utilize a Biofinity Toric fit set to verify parameters and ensure a stable fit.
Consider adjusting the lens base curve or diameter if rotation persists. A tighter or looser fit may be necessary. Evaluate blink dynamics; incomplete blinks can contribute to rotation. Patient education regarding proper lens handling and removal is crucial. If issues continue, explore alternative lens designs or parameters to achieve optimal stability and clear vision.
Remember to reassess the refraction and corneal topography to rule out any underlying issues contributing to the instability.
Managing Complaints of Glare or Haloes
Glare and haloes can occur with multifocal lens wear, particularly at night. Thoroughly assess the patient’s visual environment and lighting conditions. Ensure the lens fit is optimal; a poorly fitted lens can exacerbate these symptoms. Consider reducing the add power if haloes are prominent, especially during nighttime driving.
Evaluate the patient’s tear film quality, as dry eye can worsen glare. Recommend artificial tears as needed. Confirm the lens is clean and free of deposits. If symptoms persist, explore alternative lens materials or designs. A different multifocal design might minimize these visual disturbances.
Reassure the patient that some adaptation may be required, but persistent issues warrant further investigation.
Lens Care and Patient Education
Proper lens care and adherence to the recommended wearing schedule are crucial for comfort and eye health with Biofinity Toric Multifocal lenses.
Recommended Cleaning Solutions
Maintaining optimal hygiene is paramount when using Biofinity Toric Multifocal lenses. Patients should be instructed to use only multipurpose solutions specifically designed for silicone hydrogel contact lenses. Avoid using tap water, saline solution, or homemade solutions, as these can harbor harmful microorganisms.
CooperVision recommends solutions that effectively remove protein and lipid deposits, ensuring clear vision and lens comfort. Daily cleaning and disinfection are essential, even with daily disposable wear. Rubbing the lenses gently during cleaning helps dislodge debris. Always rinse thoroughly after cleaning and store lenses in fresh solution in a clean case.
Regular case replacement (every three months) is also vital to prevent bacterial contamination. Educate patients on proper handwashing techniques before handling lenses to minimize the risk of infection.
Wearing Schedule and Compliance
Biofinity Toric Multifocal lenses are designed for monthly replacement. Patients must adhere to the prescribed wearing schedule to maintain comfort and ocular health. Initial wear should be limited to a few hours daily, gradually increasing wear time as tolerated.
Consistent compliance with the recommended wearing schedule is crucial. Overwearing can lead to corneal hypoxia, discomfort, and increased risk of infection. Patients should be educated about the signs of corneal hypoxia, such as redness, pain, and blurred vision.
Regular follow-up appointments are essential to monitor lens fit and patient compliance. Reinforce proper lens care and wearing habits at each visit, ensuring long-term success with Biofinity Toric Multifocal lenses.
Biofinity Toric Multifocal Lens Material & Design
Biofinity Toric Multifocal lenses utilize Comfilcon A silicone hydrogel, providing high oxygen permeability. Their aspheric multifocal design delivers clear vision at all distances.
Silicone Hydrogel Material (Comfilcon A)
Biofinity Toric Multifocal lenses are crafted from Comfilcon A, a third-generation silicone hydrogel material renowned for its exceptional oxygen transmissibility – boasting 116 Dk/t. This high Dk value is crucial for maintaining corneal health, especially with extended wear or in patients prone to dryness.
Comfilcon A’s unique Aquaform Technology retains water within the lens matrix, creating a naturally hydrated surface that mimics the moisture content of the cornea. This results in enhanced comfort and reduced end-of-day dryness symptoms. The material’s inherent wettability minimizes friction during blinking, further contributing to a comfortable wearing experience.
Furthermore, Comfilcon A exhibits excellent deposit resistance, helping to maintain lens clarity and reduce the need for frequent cleaning. This material’s properties make Biofinity lenses a suitable option for a wide range of patients.
Aspheric Multifocal Design
Biofinity Toric Multifocal lenses utilize a sophisticated aspheric multifocal design to provide a smooth transition between distance and near vision. This design incorporates multiple zones of differing power, strategically arranged to correct both astigmatism and presbyopia simultaneously.
The aspheric surface minimizes spherical aberration, enhancing visual clarity and reducing distortions. This results in sharper, more natural vision at all distances. The design’s concentric zones work to deliver a wider field of view, particularly at near, improving reading and intermediate tasks.
This advanced optical design aims to reduce reliance on accommodation, lessening eye strain and promoting comfortable vision throughout the day. It’s optimized for consistent performance across various prescriptions.