Alden HP Sphere and HP Toric Lenses

Custom soft lenses for myopia, hyperopia, and astigmatism.

Alden HP Sphere Parameters
Material HP 49 (hioxifilcon B), HP 54 (hioxifilcon D), HP 59 (hioxifilcon A)
Diameters 10.0 mm to 16.0 mm
Base curves Custom base curves available on all lenses
6.5 mm to 9.7 mm
Spherical powers -30.00D to +30.00D

Toric Design

  • Double slab-off with dual thin zones
  • Thin with no prism
  • Round optics (not oval)
  • Two Dx marks at 0° and 180°
  • Front and back toric available
Alden HP Toric Parameters
Material HP 49 (hioxifilcon B), HP 54 (hioxifilcon D), HP 59 (hioxifilcon A)
Diameters 10.0 mm to 16.0 mm
Base curves Custom base curves available on all lenses
6.5 mm to 9.7 mm
Spherical powers -30.00D to +30.00D
Cylinder powers -0.50D to -10.00D
Axis 1° to 180°

Sphere and toric empirical fitting guide

1. Select diameter

  • Use 14.5 mm for normal-sized corneas
  • Add 3.5 mm to HVID to calculate other diameters

2. Select base curve from chart

3. Determine power

4. Adjust when necessary

  • Provide consultants with the following:
    • Base curve evaluation: fit/movement
    • Diameter evaluation: lens overlap
    • Orientation in 1° steps, if possible
    • Over-refraction
Consultants calculate Rx for you

Questions? Our experts are available to help.

Contact a consultant