Are you looking for a brand of toric contact lenses for astigmatism that let you maximize the amount of time you can keep them in your eyes? Most extended wear brands allow up to seven days of continuous wear. But there is one brand, Purevision Toric contact lenses from Bausch and Lomb, that are approved by the US Food and Drug Administration for up to thirty days of continuous non-stop wear before needing replacement. That is an incredibly long period of time for contact lenses.
Clearly, something very special must go into the crafting of lenses with such an incredible wearing schedule. That special thing is AerGel, the substance that makes up each lens. It is a flexible hydrogel with fantastic oxygen permeability, allowing as much as five times as much oxygen to get directly to the eye compared to other lenses. It’s almost like wearing nothing, which gives your eyes the oxygen it needs to stay healthy for as long as you are wearing the lenses.
But don’t the lenses get dirty if they stay in the eye for such a long time? Debris is indeed a challenge, but AerGel addresses that too. Purevision Toric lenses adds a surface method called Performa, which inserts ionized gas into the hydrogel to maximize its moisture-absorbing capability. The higher the amount of moisture, the better the lens can repel dirt and debris before they have a chance to stick to your eye contacts. As an added bonus, this Performa process also discourages the buildup of protein and lipids from your tears on the surface of the lens, which helps to keep the lenses feeling smooth and soft for the entire time you wear the lenses.
OK, so you can wear these lenses a very long time, but what about curing your blurry vision? Astigmatism is a condition where the eye is shaped more like an oval or egg rather than a perfect sphere. This distorts the passage of light rays into the retina, causing them instead to scatter around. When you wear lenses like Purevision Toric, they behave as a prism that sits atop the cornea and compensates for its odd shape, which restores perfect vision by re-focusing light rays on the retina where they belong.
In order for the lenses to serve as a good refracting medium, they must maintain their position on the cornea at all times. Purevision Toric lenses feature specially crafted rounded edges that force the lenses to stay still instead of rotating around. In addition, these unusual edges permit your eye’s natural tears to get behind the lenses, keeping everything wet and clean.
As with any other lens, it is important that you consult your eye doctor. The idea of such long periods of extended wear is attractive, but only your doctor can tell you if your individual physiology and medical needs will allow you to tolerate the lenses for an extended period of time between replacements.
By the way, you can use these lenses for daily wear and removal if you decide not to use them for extended wear. They feature such a good design for maximum wearing comfort that many people choose them over other brands even if they have no interest in wearing them continuously.
Whether you use Purevision Toric contact lenses for daily wear, for the maximum 30 days of extended wear, or anything in between, you will probably love using them. Maybe it’s the self-cleaning properties that would appeal to you, or the high oxygen availability, or the stability in your eyes, or something else. Whatever it is, if you try them you will discover why these lenses are among the most popular choice of brands available.
David Long is an expert on toric contact lenses. If you want the best deals and lowest prices for toric lenses, visit his site at MyToricContactLenses.com to find Purevision Toric lenses as well as many other toric lens brands.
Tags: contact lens, contact lenses, Medicine, purevision toric, purevision toric contact lenses, toric contact lenses, toric lenses, vision - eye health