Bikonveks
Single Vision • Double Aspheric
BI-ASFERA
Natural Vision. Better Cosmetics.
Bi-Asfera is an advanced double-aspheric single vision lens designed to deliver sharper peripheral clarity, reduced distortion, slimmer lens appearance, and a more natural look for stronger prescriptions.
What Is Bi-Asfera?
Bi-Asfera is a double-aspheric single vision lens solution engineered to improve vision quality across the entire lens surface. By optimizing both lens surfaces, it helps reduce peripheral blur, control unwanted magnification, and support a thinner, more attractive finished lens.
This makes it especially useful for patients who require high optical correction, improved aesthetics, and a more stable visual experience in daily wear.
Bi-Asfera helps maintain clearer peripheral perception by reducing image deformation away from the optical center.
Even in stronger prescriptions, Bi-Asfera supports a more natural eye appearance and improved cosmetic balance.
BI-ASFERA DESIGN ADVANTAGE
Double Aspheric
Bi-Asfera Design
Optimized front and back surfaces help reduce unwanted astigmatic effects across the lens.
Slim Profile & Superior Optical Performance
A flatter profile can reduce thickness by up to 15% while improving visual consistency.
Front Surface
Aspheric Design
Provides moderate peripheral improvement and helps reduce lens weight in low to medium powers.
Improved Peripheral Control
Aspheric shaping helps limit deformation and supports better lens aesthetics.
Spheric
Traditional Design
Standard spherical surfaces may create more peripheral astigmatism and higher lens thickness.
Standard Optical Construction
Image quality can be more limited away from the optical center compared with aspheric designs.
Prescription Stability Across The Lens
Bi-Asfera geometry helps keep the effective prescription more consistent across the lens surface, reducing image distortion and improving peripheral visual stability.
HOW TO FIT BI-ASFERA LENSES?
The optical axis should be positioned in relation to the eye’s center of rotation to achieve balanced vision and the intended optical performance.
Fitting Height Measurement
When pantoscopic angle is not measured, position the lens using the recommended fitting guidance below the pupil. If pantoscopic angle is measured, adjust fitting height according to the measured angle for improved alignment.