Specifications
- Material: EA, EB, HA, HB
- UV Blocking: yes
- Base Curve (mm): 7.20 to 8.60 (0.05 steps)
- Diameter (mm): 8.5, 9.0, 9.5, 10.0, 10.5
- Power Range: +10.00 to -15.00 (0.25 steps)
Add: +1.50 to +3.00 (0.25 steps)
Prism: 1.50△ Standard
Segment Height: 4.2mm Standard (adjustable)
- Packing: 1/pk
Penerangan
The "Ghosting" Problem in Soft Lenses
Most soft multifocal lenses use "simultaneous vision," where your brain sees far and near at the same time, often causing shadows or ghosting. Bi-expert™ uses Translating Design: as you look down to read, the lens shifts upward, allowing you to look through a dedicated near-power segment for "spectacle-like" clarity.
"Bi-expert: Sharp Distance Clarity and Bold Near Vision without Compromise."
Key Advantages of the Bi-expert™ Design
Crescent-Shaped Near Segment
The lens features a distinct near-power area shaped like a crescent, maximizing the visual field for heavy reading or fine-detail tasks.
Prism Ballast Stability
Utilizes a precise prism ballast to keep the lens oriented correctly, ensuring the distance and near zones are always exactly where you need them.
Frequently Asked Questions (FAQ)
1. Who is the best candidate for Bi-expert™ lenses?
It is ideal for existing RGP wearers entering presbyopia, or anyone who requires very sharp vision for reading and finds soft multifocal lenses too blurry.
2. How does the "translating" mechanism work?
When you look down, the lower eyelid pushes the lens up. This allows your pupil to look through the bottom "Near Add" part of the lens, providing pure reading power.
3. Can it correct astigmatism alongside presbyopia?
Yes. Since it is a rigid GP lens, the spherical back surface naturally neutralizes corneal astigmatism, providing much sharper vision than soft lenses.
4. Is the line between the distance and near zones visible?
To the wearer, it is not a "line" but a transition. While there is a clear distinction between the zones, the brain quickly adapts to the lens movement.
5. What is the replacement schedule for Bi-expert™?
Bi-expert™ is a high-durability RGP lens typically replaced every 12 months, making it a sustainable and high-quality visual investment.
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