Astigmatic patients replace their Frequency 55 Toric contact lenses after one month of use, avoiding the buildup of pollutants that can irritate your eyesight and cloud your vision. You will be able to locate your Frequency 55 Toric lenses in the cleaning solution with ease because of the light tint the lenses are infused with.
The lens material, methafilcon B, is a random copolymer of hyroxyethylmethacrylate and methacrylic acid. Produced with a light blue handling tint, the lens material is coupled with Reactive Blue No. 4. The handling tint increases the visibility of the lens when not worn on the eye.
|Diameter:||13.5 mm to 15.5 mm|
|Base Curve:||8.0 mm to 9.6 mm|
|Center Thickness:||0.04 mm to 0.52 mm (varies with power)|
|Powers:||-20.00 to +20.00D|
|Cylinder Power:||plano to -12.00D|
|Light Transmittance:||Approximately 88%|
|Oxygen Permeability:||19.0 x 10-11 (cm2/sec) (ml 02/ml x mmHg) at 35 degrees C (Fatt method for determination of oxygen permeability)|