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Home::Health & Medical
How Do Toric Lens Work?
Author : Charlie Cory
Before we can ask "How do toric lens work", we really need to understand what they do, and what they were created for. Toric contact lenses can be soft, meaning they are made from soft plastic that can alter its shape to fit the shape of the eye. This is as opposed to hard (gas permeable - GP) lenses which are rigid in construction. A toric lens is special, in that it was designed to help correct astigmatism. What Is Astigmatism? Astigmatism can take two forms, but it is usually understood to mean an optical malfunction caused by a misshaping of either the cornea or the optic lens. A normal cornea is one with is round in shape, just like a ball. In an astigmatic, the shape is different, and the ends of the cornea have extended ends. More rugby ball or american football shaped. What happens then is that the light hits the cornea in two places rather than one. This is because the shape of the astigmatic eye has a steeper and flatter curve due to the shape of the cornea. This is called corneal astigmatism. Sometimes, astigmatism is the result of an irregularly shaped optic lens, which is located behind the cornea. This is called lenticular astigmatism. The effect to the sufferer is much the same though. Astigmatism manifests itself as slightly blurred vision, but can also cause headaches and eye aches. How Is a Toric Lens Different To Other Contact Lenses? When you place a contact lens in your eye, the lens sits on top of a film of water. If it didn't, your eye would be dry, and it would cause you discomfort. Because the lens is on a liquid platform, it can rotate, but in non astigmatics, this is not really a problem. However, in an astigmatic, the lens needs to stay put in order to correct the astigmatism. In a toric lens, this is achieved by weighting the lens so that the bottom is heavier than the top. This of course means that the bottom of the lens will always point downwards, ensuring that the prescription of the lens acts correctly. There is one other difference of a toric lens over a normal one, in that the lens has two prescriptions in one. One will correct the astigmatism, and the other will correct the shortsightedness or long sightedness (depending on what you have). Because of the more complex nature of the toric lens, they are often more expensive than conventional lenses. Charlie Cory is an Internet Entrepeneur. http://www.fx-eyes.com/how_do_toric_lens_work.html Spam emails More free articles Related articles
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Pirate Booty
I wear bifocal lenses, and on top of that, they have to be fitted for astigmatism. Official name is multifocal toric lenses, because I can no longer do the bit where they put a reading lens in one eye and a distance lens in the other ...I want toric contact lenses glasses dont look good on me
I can't afford them and I have an astigmatism so I can't have the regular kind of contact lenses. Thanks for looking and happy voting! How Do Toric Lens Work?
Before we can ask “How do toric lens work”, we really need to understand what they do, and what they were created for. Toric contact lenses can be soft, meaning they are made from soft plastic that can alter its shape to fit the shape ... Contact lenses and dry eye. Diazepam and dry eye for health care ...
When dry, soft contact lenses are brittle and break easily they absorb a therefore, patients with dry eye generally are fortable wearing lenses that have a low water. Toric contact lenses - a discussion of toric contact lenses (for ... Toric Contact Lenses: Soft Toric Contacts Can Correct Astigmatism
Toric lenses can be either soft or Rigid Gas Permeable (RGP). The RGP lenses are stiffer than the soft ones and retain their shape on the cornea better. This can result in crisper vision for some people, although many do not notice any ... Colored Toric Lenses - Stop Astigmatism With Colored Toric Lenses
In other words, treat your contacts with great care and make sure that you do stick to the cleaning regime if you need to and you should not have any problems with your colored toric lenses or any contact lenses for that matter. ... Silicone hydrogel toric lenses. Contact lenses. “We found that ...
“… to apply a theoretical analysis of the relationship between contact lens oxygen transmissibility and tear layer oxygen tension to silicone hydrogel toric lenses and thereby model the success of such lenses in decreasing corneal ... Durasoft Color Contact Lenses - The New You Starts Today
However, do not despair. Today would are able to buy toric colored contacts that are made specially to fight astigmatism. But again, expect to pay a bit more for these types of colored lenses. Give Them A Go First ... Colored Toric Lenses - Look Cool With Colored Toric Lenses
The first thing that you should do if you were interested in colored toric lenses is to contact an eye doctor or eye specialist to discuss the option. You must also be aware that these lenses are probably going to be more expensive than ... Types of contact lenses
A toric lens is one in which either or both of the optical surfaces have the effect of a cylindrical lens, usually in combination with the effect of a spherical lens. Myopic (nearsighted) and hypermetropic (farsighted) people who also ...
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