Oxyflex Percon – Boston XO
Oxyflex Percon is a custom-made rigid gas permeable RGP contact lens manufactured according to the prescription and measurements of each eye.
Its design is based on:
Six Curves
with an:
Aspheric Periphery
to provide a gradual transition between the central optical zone and the lens periphery.
The Percon design is available in a range of Base Curves, Diameters, and powers, allowing the eye care professional to customize the lens according to:
- Corneal curvature
- Prescription
- Lens movement
- Lens centration
- Fluorescein fitting pattern
The requested version is manufactured from:
Boston XO – Hexafocon A
a high oxygen-permeability RGP material known for dimensional stability and durability and used in specialized optical designs and advanced refractive requirements.
Delivery Time
The lenses are supplied within a maximum period of:
30 to 60 days
from the date the order is confirmed.
Oxyflex Percon Design Specifications
The following specifications are published in Cantor Barnard’s Oxyflex Percon information:
Specification | Value |
|---|
Design Type | Custom RGP |
Number of Curves | 6 Curves |
Periphery | Aspheric Periphery |
Base Curve | 7.00–8.50 mm |
Base Curve Steps | 0.05 mm |
Diameter | 8.50–11.50 mm |
Diameter Steps | 0.50 mm |
Power Steps | 0.25D |
Handling Tints in Booklet | Blue / Clear / Green / Grey |
Additional Parameters | May be available on request |
Diagnostic Fitting Set
Cantor Barnard offers a professional Oxyflex Percon fitting set with:
Specification | Value |
|---|
Number of Trial Lenses | 20 |
Base Curve Range | 7.30–8.25 mm |
Diameter | 9.00 mm |
Power | -3.00D |
Category | Professional Diagnostic Fitting Set |
Boston XO Material Specifications
Official Boston XO material specifications published by Bausch + Lomb include:
Property | Value |
|---|
Trade Name | Boston XO® |
USAN / Scientific Name | Hexafocon A |
Material Type | Siloxanyl Fluoromethacrylate Copolymer |
Oxygen Permeability – ISO/Fatt | Dk 100 |
Oxygen Permeability – Gas-to-Gas | Dk 140 |
Refractive Index | 1.415 |
Specific Gravity | 1.27 |
Wetting Angle | 49° |
Water Content | Less than 1% |
Saline Absorption | 1.0% |
Hardness | Rockwell R 112 |
Visible Light Transmission | Approx. 92% |
Surface Characteristic | Hydrophobic |
Wear Schedule | Daily Wear |
Disinfection | Chemical only |
Material Handling Tints
Boston XO documentation lists tint options including:
UK material information may list a more limited selection such as:
The actual tint available for the Percon lens depends on:
Material stock and Cantor Barnard manufacturing availability.
UV Protection
The Boston XO material described in Bausch + Lomb documentation contains an:
MHB UV absorber
However, the exact Boston XO blank used for the final manufactured lens should be confirmed before adding UV Protection as a product claim.
UV-absorbing contact lenses are also not a substitute for:
Protective sunglasses
Key Features
- Six-curve design
- Aspheric peripheral geometry
- Custom-made to the prescription and measurements of each eye
- High oxygen-permeability Boston XO material
- Good dimensional stability and durability
- Wide range of Base Curves, Diameters, and powers
- Water content below 1%
- Customized optical correction
- Daily Wear under professional supervision
- Additional modifications may be available according to laboratory capabilities
The design features are based on Oxyflex Percon, while the material characteristics relate specifically to Boston XO.
Suitable Applications
The Percon design may be used, following professional assessment, to correct:
- Myopia
- Hyperopia
- Astigmatism
- Higher prescriptions
- Prescriptions not readily available in standard stock lenses
- Cases requiring a customized RGP design
Boston XO material itself is approved for use in various GP lens designs, including:
- Spherical
- Aspheric
- Toric
- Irregular cornea designs
Its general material applications may include designs used for:
- Keratoconus
- Pellucid Marginal Degeneration
- Selected Post-Graft cases
- Selected Post-Refractive Surgery cases
This does not mean that the Percon design is automatically suitable for all these conditions.
The eye care professional must determine the appropriate clinical lens design.
General Boston XO Regulatory Ranges
The following ranges relate to the general manufacturing capabilities of Boston XO material and should not be interpreted as confirmed Oxyflex Percon ranges:
Design Type | Power Range | Diameter | Base Curve |
|---|
Spherical | -20.00D to +20.00D | 7.00–21.00 mm | 5.00–9.00 mm |
Aspheric | -20.00D to +20.00D | 7.00–21.00 mm | 6.00–9.20 mm |
Toric | -20.00D to +20.00D | 7.00–21.00 mm | 6.80–9.50 mm |
Irregular Corneas | -20.00D to +20.00D | 7.00–21.00 mm | 4.00–9.00 mm |
Parameters Required When Ordering
Field | English Term |
|---|
Eye | OD / OS |
Base Curve | Base Curve / BOZR |
Overall Diameter | Total Diameter |
Power | Back Vertex Power |
Material | Boston XO |
Handling Tint | Handling Tint |
Corneal Curvature | K Readings |
Corneal Map | Corneal Topography |
Fluorescein Pattern | Fluorescein Pattern |
Over-Lens Refraction | Over-Refraction |
Optic Zone Diameter | Optic Zone Diameter |
Centre Thickness | Centre Thickness |
Peripheral Modifications | Peripheral Modifications |
Toric Option if Required | Toric Design |
Wearing Schedule
The lens is intended for:
Daily Wear
It should not be worn during sleep.
The eye care professional determines:
- Daily wearing hours
- Adaptation schedule
- Replacement schedule
- Follow-up frequency
Boston XO instructions indicate that the material is not intended for routine overnight wear.
Wearing time should generally be increased gradually according to ocular tolerance and professional guidance.
Lens Care Instructions
- Wash and dry hands thoroughly before handling the lens
- Use cleaners and solutions intended specifically for RGP contact lenses
- Clean and disinfect the lens using chemical disinfection only
- Do not use heat sterilization
- Use fresh solution for every cleaning and disinfection cycle
- Do not use saliva to clean or wet the lens
- Store the lens fully immersed in the recommended solution
- Do not wear the lens if it is scratched or cracked
- Keep the lens case clean
- Replace the lens case regularly
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