Focus 1-2 Week SoftColor contact lenses are manufactured by CIBA Vision to be worn as daily wear lenses for up to two weeks and then thrown away.  Designed to alter the color of light eyes, Focus 1-2 Week SoftColor disposable lenses reduce the amount of deposits that build up on contact lenses and irritate your eyes because they are routinely replaced with fresh lenses.

Lens Material
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).
 

Lens Parameters
Chord Diameter:	14.0 mm
Center Thickness:	0.06 mm at all minus powers
	0.12 mm at +3.00D (varies with power)
Base Curves:	8.4 mm and 8.8 mm
Powers:	-6.00D to +4.00D (0.25D steps)
Tints:	Royal Blue, Aqua and Evergreen

Lens Properties
Specific Gravity:	1.12
Refractive Index (hydrated):	1.415
Tint Transmittance (approx.):	Royal Blue 88%
	Aqua 89%
	Evergreen 88%
	*Note: In conditions of low light, wearers of some darkly tinted lenses may experience reduced visibility
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