Alden Enhancement Tints

Our specialty tints are available with a number of tinting options:

  • Standard tints with or without clear pupils
  • Black pupils
  • Black pupils with tint
  • Black annulars with clear pupils
 
tints chart
  Materials Diameter Base Curve Sphere Cylinder Axis
ALDEN
HP TORIC
or
SPHERE
HP 49
(Hioxifilcon B)
ANY
AVAILABLE

14.5 suggested
ANY
AVAILABLE

8.3, 8.6, 8.9
suggested
+30.00 to
-30.00

in 0.25 steps
-0.25 to
-10.00

in 0.25 steps
1° to 180°
in 1° steps
ALDEN
CLASSIC SPHERE
CLASSIC 38
Polymacon,
38% water,
9Dk (IS0)
ANY
AVAILABLE

13.0, 13.5, 14.0 suggested
ANY
AVAILABLE

7.7, 7.9, 8.1, 8.3,
8.5, 8.7, 8.9 suggested
+30.00 to
-30.00

in 0.25 steps
-0.25 to
-10.00

in 0.25 steps
1° to 180°
in 1° steps

Empirical Fitting Guide

Diameter Selection

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

Alden Classic Fitting

  • For Alden Classic 38 or Alden Classic 55, contact one of our consultants for fitting assistance
BASE CURVE SELECTION CHART