Alden Optical Laboratories

Sphere
HP Sphere
Classic Sphere
GP Sphere

Toric
HP Toric
Classic Toric
GP Toric

Bifocal/Multifocal
Boston MultiVision

Resources (*PDF)
GP Lens Materials
*Soft Lens Tints
*Soft Lens Usage Guide
*Sales Policies
*D/K Conversion Charts
 
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Utility

The "go to lens" when:
• desired lens parameter are not available
• commodity lenses yield unacceptable results

Frequency Quarterly planned replacement and/or conventional use
Materials Hioxifilcon B · 49% water · 15 Dk (ISO) · daily wear (standard material)
Hioxifilcon A · 59% water · 24 Dk (ISO) · daily wear
Base Curves ... 7.7, 8.0, 8.3, 8.6, 8.9, 9.2, 9.5mm ...
Diameters ... 13.5, 14.0, 14.5, 15.0, 15.5mm ...
Sphere Powers -30.00 D. to +30.00 D. in 0.25 D. steps
Colors • Clear
• Visitint Blue
• Tinted (Aqua, Azure, Blue, Brown, Gray, Green, Jade, Yellow, Walnut, #1 light, #2 medium, and #3 dark)
Packaging Quarter Pack Program (NEW)
• Single Lens, Warranted
• Single Lens, Non-Warranted
• 3-Pack, Non-Warranted
Manufacturing Fully lathe cut to order on CNC lathes
Downloads Product White Sheet (PDF)
Professional Fitting Guide (PDF)
Package Insert (PDF)
Empirical Fitting Procedure
Base Curve • Calculate the average K, and locate the recommended Base Curve on the chart.
• Base curve suggestions are based on fitting experience and the most commonly prescribed combinations.
• Certain corneal topographies may require a different base curve than is suggested.

Avg. K-Reading Base Curve
41.25 & flatter 8.90
41.50 to 45.50 8.60
45.75 & Steeper 8.30
Power Convert the spectable power in the major meridians to contact lens power using a vertex conversion table.
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