These contact lenses from Celena's recently launched Natural Collection are sure to draw attention. Bright blue that can be worn both during the day and at 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. Only one prescription lens per degree is included in each prescription lens pack.