If you’re looking to push the limits of extended wear contact lenses for astigmatism, you will want to consider Purevision Toric lenses from Bausch and Lomb. Approved by the FDA for up to thirty days of continuous extended wear, they are among the sturdiest and lowest maintenance disposable lenses available. (If you prefer not to use contact lenses on a continuous basis, you can also use Purevision Toric lenses for up to thirty days of daily wear and removal.)
Careful design must go into the construction of any lenses that will stay in your eyes for such a long period of time, and Purevision Toric lenses excel in this regard. They use a silicone hydrogel matrix called AerGel, a super-permeable material that is specifically designed to allow the natural flow of oxygen directly to your eye. Oxygen permeability helps to ensure ocular health. AerGel permits up to five times more oxygen to the eye than conventional contact lens polymers, making it almost the same as not wearing contact lenses at all.
Continuous wear contact lenses must also stay clean and debris-free for a long time. Purevision Toric achieves this by using a surface process Bausch and Lomb calls Performa, which inserts ionized gas into the AerGel polymer that greatly improves its ability to absorb moisture. The higher moisture level assists in repelling dirt and debris before they have a chance to stick to your lenses and reduce your vision. Performa also reduces the build up of protein and lipids on the lenses, both of which can cause irritation and discomfort. The Performa process does all of this without affecting oxygen permeability.
The combination of AerGel and the Performa process works amazingly well to continuously maintain the eye’s natural moisture level for as long as the lenses are worn. Continual moisture leads to a trouble-free, comfortable experience with your eye contacts.
Astigmatism is a condition where the shape of the eye reflects light in many different directions instead of focusing it correctly on the retina. Toric lenses re-focus light rays to provide clear vision, and must keep a stable position on the eye to do that. Purevision Toric lenses do this very well, employing a carefully crafted shape with rounded edges that allows for maximum stability on the eyeball while providing crystal-clear eyesight for anyone suffering from the fuzziness typical of astigmatism. The rounded edges have the additional benefit of allowing tears to flow under the lenses, helping even more to remove debris and keep them wet.
If you are considering Purevision Toric for continuous wear, you must check with your physician to ensure your eyes can handle that, even if you are already using these lenses for daily wear. Every person’s vision needs are different, and not everyone can safely use continuous extended wear. Only your doctor can tell you for sure.
Whether you use Purevision Toric lenses for daily wear/monthly disposal or for 30-day extended wear between removals, their low maintenance requirements make them a great choice for just about anyone who wants a minimum of fuss with their contact lenses. They guarantee clear, crisp visual acuity from any angle for as long as you wear your lenses. Try them out and see for yourself!
David Long is an expert who writes about toric contact lenses. Visit his site at MyToricContactLenses.com to find Purevision Toric lenses and other toric brands for the best price.
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