These contact lenses from Celena's recently launched Natural Collection are sure to draw attention. Both light and dark eyes will be accentuated by this lovely grey shade that overlooks turquoise and has a hint of green. It can be worn day or night. Curvature of the lens base: 8.6 38% water content 14.5 mm in diameter Duration of Use: Three Months Note: Two pairs of non-prescription cosmetic lenses are included in each pack. One prescription lens per degree is included in each prescription lens pack.