Focus Monthly Toric contact lenses are manufactured to be worn by patients suffering from astigmatism and are designed to be worn as daily wear lenses for up to a month and discarded. Focus Monthly Toric disposable lenses are made by CIBA Vision and greatly reduce the amount of deposits that can bind themselves to contact lenses and irritate your vision because they are replaced with fresh lenses on a regular basis. Focus Monthly Toric lenses are made with a light blue tint to help you locate your lenses in the solution.
The lens material is 55% water and 45% vifilcon A, a hydrophilic co-polymer of 2-hydroxyethyl methacrylate and povidone, USP. The chemical name is poly (2-hydroxyethyl methacrylate-co-ethylene dimethacrylate co-methacrylic acid-g-povidone).
|Chord Diameter:||14.5 mm|
|Center Thickness:||0.14 mm at-3.00D (varies with power)|
|0.26 mm at +3.00D (varies with power)|
|Base Curves:||8.9 mm and 9.2 mm|
|Powers:||-6.00D to +4.00D sphere (0.25D steps)|
|-1.00D, -1.75D, -2.50D cylinder Full circle (10 degree steps)|
|Refractive Index (hydrated):1.415|
|Light Transmittance (approx.):||93%|
|Oxygen Permeability (Dk):||16.0 x 10-11 (cm2/sec)(ml O2/ml x mmHg), measured at 23 degrees C (Fatt method)|
|Water Content:||55% by weight in normal saline|