Alden HP Sphere


Custom Spheres That Deliver Unmatched Control

When it comes to contact lenses that give you a higher level of fitting control, all spheres are not created equal. In fact, each Alden HP Sphere lens is custom-made to your exact specifications—you decide the sphere power (up to +/-30.00D in 0.25D steps), base curve, and diameter.

That remarkable level of flexibility and control makes Alden HP Sphere perfect for when:

  • Your patient’s current sphere lens is unavailable due to product discontinuations
  • Other companies’ lenses fail to provide the parameters you need
  • Commodity lenses don’t provide the precise vision and fit you require

Outstanding lenses backed by uncompromising service.

Sure, Alden HP Sphere lenses allow even your most difficult-to-fit patients to experience the benefits of soft contact lenses. But working with Alden Optical also allows you to enjoy the service and support you need to help ensure patient success.

  • Choose from an incredible range of sphere powers
  • Available in virtually any base curve or diameter
  • All single lens orders carry a full (100%) 90-day warranty
  • Orders ship within two business days
  • Choose from annual, quarterly, bi-monthly, or monthly replacement schedules
  Materials Diameter Base Curve Sphere
HP 49
lens material of first choice
for extreme dry eye

14.5 suggested

8.3, 8.6, 8.9
+30.00 to -30.00
in 0.25 steps
    No additional charge
for any diameter or base curve
outside of this range

Empirical Fitting Guide

Diameter Selection

  • Use the 14.5 diameter for normal-sized corneas
  • If a different diameter is desired, add 3.5 mm to the HVID to calculate the lens diameter

Base Curve Selection

  • Use the chart to select the base curve based on the diameter and average K reading

Power Determination

  • Use standard vertex adjustment to convert the spectacle Rx, or call our consultants and let us do it for you

Adjustments (when necessary)

  • When evaluating the fit of the lens, please provide our consultants with the following data:
    • Fit/movement (base curve evaluation)
    • Lens overlap (diameter evaluation)
    • Orientation, in 1° increments if possible
    • Over-refraction
  • We’ll calculate the Rx for you