Contact lenses are worn in place of traditional eyeglasses. Companies that specialise in developing eye health products have introduced a wide selection of lenses such as Bausch & Lomb's PureVision and Ciba Vision's Focus Night and Day. These contact lenses are designed and developed to accommodate the wearer's lifestyle.
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PureVision contact lenses were introduced by Bausch & Lomb. The eye health company was founded in 1853 and distributes products brands such as Optima and SofLens. The PureVision brand consists of four types of contacts: Pure Vision 2 HD Lenses, PureVision Lenses, PureVision Multi-Focal and PureVision Toric Lenses.
Ciba Vision was established in 1996 as a division of Novartis, a producer of health care products and vaccines. Ciba Vision reintroduced Focus Night and Day contact lenses as Air Optix Night and Day contacts, alongside Air Optix Aqua, Air Optix Astigamatism and Air Optix Multi-focal, in 2010.
PureVision and Focus Night and Day are contacts made of silicon hydrogel, which provides three times the oxygen to the cornea of the eye compared to regular soft lenses. Baush & Lomb also makes PureVision contact lenses with AerGel and Performa material: Perfoma promotes health and comfort while AerGel controls the hydration of the eye and keeps deposits of lipids and protein out of the eye. Bausch & Lomb recommends that a pair of PureVision contact lenses be removed prior to sleeping and replaced once every 30 days.
Ciba Vision's Focus Night and Day contacts feature the TriComfort technology, which allows a continuous flow of oxygen to the eye and keeps the lenses moist while enabling the wearer to resist deposits in the eye. Focus Night and Day lenses may be worn for up to 30 consecutive days and should be replaced once every 30 days. Ciba Vision recommends talking to an eye care practitioner to determine the safest personal options for consecutive wear.
As of October 2010, PureVision contact lenses can be purchased for £16 to £22 depending on the number of boxes ordered and the retailer. Focus Night and Day contact lenses range £26 to £39. Each box contains six contact lenses for one eye.
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